Earth  Day is a day that is intended to inspire awareness and appreciation for  the Earth's natural environment. Earth Day was founded by United States  Senator Gaylord Nelson as an environmental teach-in first held on April  22, 1970. While this first Earth Day was focused on the United States,  an organization launched by Denis Hayes, who was the original national  coordinator in 1970, took it international in 1990 and organized events  in 141 nations.[1][2] Earth Day is now coordinated globally by the Earth  Day Network,[3] and is celebrated in more than 175 countries every  year.[4] Numerous communities celebrate Earth Week, an entire week of  activities focused on environmental issues. In 2009, the United Nations  designated April 22 International Mother Earth Day.[5]
The first Earth Day

Gaylord Nelson
Responding  to widespread environmental degradation[citation needed], Gaylord  Nelson, a United States Senator from Wisconsin, called for an  environmental teach-in, or Earth Day, to be held on April 22, 1970. Over  20 million people participated that year, and Earth Day is now observed  on April 22 each year by more than 500 million people and several  national governments in 175 countries.[citation needed]
Senator  Nelson, an environmental activist, took a leading role in organizing the  celebration, hoping to demonstrate popular political support for an  environmental agenda. He modeled it on the highly effective Vietnam War  teach-ins of the time.[6] Earth Day was first proposed in a prospectus  to JFK written by Fred Dutton.[7] However, Nelson decided against much  of Dutton's top-down approach, favoring a decentralized, grassroots  effort in which each community shaped their action around local  concerns.
Nelson had conceived the idea for Earth Day following a  trip he took to Santa Barbara right after the horrific oil spill off the  coast in 1969.[citation needed] Outraged by the devastation and  Washington political inertia, Nelson proposed a national teach-in on the  environment to be observed by every university campus in the U.S.[8]

I  am convinced that all we need to do to bring an overwhelming insistence  of the new generation that we stem the tide of environmental disaster  is to present the facts clearly and dramatically. To marshal such an  effort, I am proposing a national teach-in on the crisis of the  environment to be held next spring on every university campus across the  Nation. The crisis is so imminent, in my opinion, that every university  should set aside 1 day in the school year-the same day across the  Nation-for the teach-in.[8]
One of the organizers of the event said:
"We're  going to be focusing an enormous amount of public interest on a whole,  wide range of environmental events, hopefully in such a manner that it's  going to be drawing the interrelationships between them and, getting  people to look at the whole thing as one consistent kind of picture, a  picture of a society that's rapidly going in the wrong direction that  has to be stopped and turned around.
"It's going to be an enormous  affair, I think. We have groups operating now in about 12,000 high  schools, 2,000 colleges and universities and a couple of thousand other  community groups. It's safe to say I think that the number of people who  will be participating in one way or another is going to be ranging in  the millions."[9]
Nelson announced his idea for a nationwide  teach-in day on the environment in a speech to a fledgling conservation  group in Seattle on September 20, 1969, and then again six days later in  Atlantic City to a meeting of the United Auto Workers. Senator Nelson  hoped that a grassroots outcry about environmental issues might prove to  Washington, D.C. just how distressed Americans were in every  constituency. Senator Nelson invited Republican Representative Paul N  “Pete” McCloskey to serve as his co-chair and they incorporated a new  non-profit organization, environmental Teach-In, Inc., to stimulate  participation across the country. Both continued to give speeches  plugging the event.[10][11][12]
On September 29, 1969, in a long, front-page New York Times article, Gladwin Hill wrote:
"Rising  concern about the "environmental crisis" is sweeping the nation's  campuses with an intensity that may be on its way to eclipsing student  discontent over the war in Vietnam...a national day of observance of  environmental problems, analogous to the mass demonstrations on Vietnam,  is being planned for next spring, when a nationwide environmental  'teach-in'...coordinated from the office of Senator Gaylord Nelson is  planned...."[13]

Denis  Hayes, a Harvard graduate student, read the NYT article and traveled to  Washington to get involved.[14] He had been student body president and a  campus activist at Stanford University in McCloskey’s district and  where Teach-In board member Paul Ehrlich was a professor. He thought he  might be asked to organize Boston. Instead, Nelson eventually asked  Hayes to drop out of Harvard, assemble a staff, and direct the effort to  organize the United States.[15][16] Hayes would go on to become a  widely recognized environmental advocate.[17]
Hayes recruited a  handful of young college graduates to come to Washington, D.C. and began  to plan what would become the first Earth Day.
Nelson's  suggestion was difficult to implement, as the Earth Day movement proved  to be autonomous with no central governing body.[18] As Senator Nelson  attests, it simply grew on its own:
Earth Day worked because of  the spontaneous response at the grassroots level. We had neither the  time nor resources to organize 20 million demonstrators and the  thousands of schools and local communities that participated. That was  the remarkable thing about Earth Day. It organized itself.[18]
Official  Earth Week logo that was used as the backdrop for the prime time CBS  News Special Report with Walter Cronkite about Earth Day 1970.[19]
On  April 22, 1970, Earth Day marked the beginning of the modern  environmental movement. Approximately 20 million Americans participated.  Thousands of colleges and universities organized protests against the  deterioration of the environment. Groups that had been fighting against  oil spills, polluting factories and power plants, raw sewage, toxic  dumps, pesticides, Freeway and expressway revolts, the loss of  wilderness, and air pollution suddenly realized they shared common  values.
Media coverage of the first Earth Day included a One-Hour  Prime-time CBS News Special Report called "Earth Day: A Question of  Survival," with correspondents reporting from a dozen major cities  across the country, and narrated by Walter Cronkite (whose backdrop was  the Earth Week Committee of Philadelphia's logo).[19]
Pete Seeger  was a keynote speaker and performer at the event held in Washington DC.  Paul Newman and Ali McGraw attended the event held in New York City.[20]
[edit]Earth Day 1970 in New York City
In  the winter of 1969-1970, a group of students met at Columbia University  to hear Denis Hayes talk about his plans for Earth Day. Among the group  were Fred Kent, Pete Grannis, and Kristin and William Hubbard. This New  York group agreed to head up the New York City part of the national  movement. Fred Kent took the lead in renting an office and recruiting  volunteers. "The big break came when Mayor Lindsay agreed to shut down  5th Avenue for the event. A giant cheer went up in the office on that  day," according to Kristin Hubbard (now Kristin Alexandre). 'From that  time on we used Mayor Lindsay's offices and even his staff. I was  Speaker Coordinator but had tremendous help from Lindsay staffer Judith  Crichton."
In addition to shutting down Fifth Avenue,  Mayor Lindsay made Central Park available for Earth Day. The crowd was  estimated as more than one million—by far the largest in the nation.  Since New York was also the home of NBC, CBS, ABC, the New York Times,  Time, and Newsweek, it provided the best possible anchor for national  coverage from their reporters all over the country.[21]
[edit]Earth Day 1970 in Philadelphia
Edward  Furia (left) and Austan Librach (right) in a meeting in early 1970 with  the Philadelphia Chamber of Commerce, in which they raised $30,000 to  fund Earth Day activities and expose the city's worst polluters.[22]
U.S. Senator Edmund Muskie speaking to an estimated 40-60,000 at Fairmount Park, Philadelphia on Earth Day, 1970
Earth  Day 1970 in Philadelphia gave birth to Earth Week, April 16–22. It was  created by a committee of students (mostly from University of  Pennsylvania), professionals, leaders of grass roots organizations and  businessmen concerned about the environment and inspired by Senator  Gaylord Nelson’s call for a national environmental teach-in. The Earth  Week Committee of Philadelphia concluded that devoting only one day to  the environment would not provide enough time and space to paint a  comprehensive picture of the environmental issues confronting  mankind.[23] While all of their activities would build toward a  climactic Earth Day celebration on April 22, there would also be an  entire week of events in the week preceding.
Austan Librach, a  regional planning graduate student, assumed the role of Committee  Chairman and hired Edward Furia, who had just received his City Planning  and Law Degrees from University of Pennsylvania, to be Project  Director. The core group from Penn was joined in 1970 by students from  other area colleges which, working together, organized scores of  educational activities, scientific symposia and major mass media events  in the Delaware Valley Region in and around Philadelphia. The Earth Week  Committee of 33 members settled on a common objective—to raise public  awareness of environmental problems and their potential  solutions.[23][24]
U.S. Senator Edmund Muskie was the keynote  speaker on Earth Day in Fairmount Park in Philadelphia.[23][25] Other  notable attendees included consumer protection activist and presidential  candidate Ralph Nader; Landscape Architect Ian McHarg; Nobel  prize-winning Harvard Biochemist, George Wald; U.S. Senate Minority  Leader, Hugh Scott; and poet, Allen Ginsberg. Forty years later, the  Earth Week Committee decided to make rare photos, video and other  previously unpublished information about the history of Earth Week 1970  available to the public at EarthWeek.us.
Many cities now extend  the observance of Earth Day events to an entire week, usually starting  on April 16 and ending on Earth Day, April 22.[26] These events are  designed to encourage environmentally aware behaviors, such as  recycling, using energy efficiently, and reducing or reusing disposable  items.[27]
[edit]Results of Earth Day 1970
Earth Day proved  popular in the United States and around the world. The first Earth Day  had participants and celebrants in two thousand colleges and  universities, roughly ten thousand primary and secondary schools, and  hundreds of communities across the United States. More importantly, it  "brought 20 million Americans out into the spring sunshine for peaceful  demonstrations in favor of environmental reform."[28]
Senator  Nelson stated that Earth Day "worked" because of the response at the  grassroots level. Twenty-million demonstrators and thousands of schools  and local communities participated.[29] He directly credited the first  Earth Day with persuading U.S. politicians that environmental  legislation had a substantial, lasting constituency.
It is now  observed in 175 countries, and coordinated by the nonprofit Earth Day  Network, according to whom Earth Day is now "the largest secular holiday  in the world, celebrated by more than a half billion people every  year."[30] Environmental groups have sought to make Earth Day into a day  of action which changes human behavior and provokes policy changes.[31]
[edit]Earth Day 20 and Earth Day 1990
The official logo of the Mount Everest Earth Day 20 International Peace Climb.
Mobilizing  200 million people in 141 countries and lifting the status of  environmental issues onto the world stage, Earth Day activities in 1990  gave a huge boost to recycling efforts worldwide and helped pave the way  for the 1992 United Nations Earth Summit in Rio de Janeiro. Unlike the  first Earth Day in 1970, this 20th Anniversary was waged with stronger  marketing tools, greater access to television and radio, and  multimillion-dollar budgets.[32]
Two separate groups formed to  sponsor Earth Day events in 1990: The Earth Day 20 Foundation, assembled  by Edward Furia (Project Director of Earth Week in 1970), and Earth Day  1990, assembled by Denis Hayes (National Coordinator for Earth Day  1970). Senator Gaylord Nelson, the original founder of Earth Day, was  honorary chairman for both groups. The two did not combine forces over  disagreements about leadership of combined organization and incompatible  structures and strategies.[33] Among the disagreements, key Earth Day  20 Foundation organizers were critical of Earth Day 1990 for including  on their board Hewlett Packard, a company that at the time was the  second-biggest emitter of chlorofluorocarbons in Silicon Valley and  refused to switch to alternative solvents.[33] In terms of marketing,  Earth Day 20 had a grassroots approach to organizing and relied largely  on locally based groups like the National Toxics Campaign, a  Boston-based coalition of 1,000 local groups concerned with industrial  pollution. Earth Day 1990 employed strategies including focus group  testing, direct mail fund raising, and email marketing.[33]
The  Earth Day 20 Foundation highlighted its April 22 activities in George,  Washington, near the Columbia River with a live satellite phone call  with members of the historic Earth Day 20 International Peace Climb who  called from their base camp on Mount Everest to pledge their support for  world peace and attention to environmental issues.[34] The Earth Day 20  International Peace Climb was led by Jim Whittaker, the first American  to summit Mt. Everest (many years earlier), and marked the first time in  history that mountaineers from the United States, Soviet Union and  China had roped together to climb a mountain, let alone Mt. Everest.[34]  The group also collected over two tons of trash (transported down the  mountain by support groups along the way) that was left behind on Mount  Everest from previous climbing expeditions. The master of ceremonies for  the Columbia Gorge event was the TV star, John Ratzenberger, from  "Cheers", and the headlining musician was the "Father of Rock and Roll,"  Chuck Berry.[34]
[edit]Earth Day 2000
Earth Day  2000 combined the ambitious spirit of the first Earth Day with the  international grassroots activism of Earth Day 1990. This was the first  year that Earth Day used the Internet as its principal organizing tool,  and it proved invaluable domestically and internationally. Kelly Evans, a  professional political organizer, served as Executive Director of the  2000 campaign. The event ultimately enlisted more than 5,000  environmental groups outside the United States, reaching hundreds of  millions of people in a record 183 countries.[35] Leonardo DiCaprio was  the official host for the event,[35] and about 400,000 participants  stood in the cold rain during the course of the day.
[edit]Subsequent Earth Day events
Earth Day 2007 at San Diego City College in San Diego, California.
To  turn Earth Day into a sustainable annual event rather than one that  occurred every 10 years, Senator Nelson and Bruce Anderson, New  Hampshire's lead organizer in 1990, formed Earth Day USA. Building on  the momentum created by thousands of community organizers around the  world, Earth Day USA coordinated the next five Earth Day celebrations  through 1995, including the launch of EarthDay.org. Following the 25th  Anniversary in 1995, the coordination baton was handed to Earth Day  Network.
As the millennium approached, Hayes agreed to spearhead  another campaign, this time focusing on global warming and pushing for  clean energy. The April 22 Earth Day in 2000 combined the big-picture  feistiness of the first Earth Day with the international grassroots  activism of Earth Day 1990. For 2000, Earth Day had the Internet to help  link activists around the world. By the time April 22 came around,  5,000 environmental groups around the world were on board, reaching out  to hundreds of millions of people in a record 184 countries. Events  varied: A talking drum chain traveled from village to village in Gabon,  Africa, for example, while hundreds of thousands of people gathered on  the National Mall in Washington, D.C., USA.
Earth Day 2007 was one  of the largest Earth Days to date, with an estimated billion people  participating in the activities in thousands of places like Kiev,  Ukraine; Caracas, Venezuela; Tuvalu; Manila, Philippines; Togo; Madrid,  Spain; London; and New York.[citation needed]
[edit]The Earth Day name
According  to Senator Nelson, the moniker "Earth Day" was "an obvious and logical  name" suggested by "a number of people" in the fall of 1969, including,  he writes, both "a friend of mine who had been in the field of public  relations" and "a New York advertising executive," Julian Koenig.[36]  Koenig, who had been on Nelson's organizing committee in 1969, has said  that the idea came to him by the coincidence of his birthday with the  day selected, April 22; "Earth Day" rhyming with "birthday," the  connection seemed natural.[37][38] Other names circulated during  preparations—Nelson himself continued to call it the National  Environment Teach-In, but press coverage of the event was "practically  unanimous" in its use of "Earth Day," so the name stuck.[36]
[edit]Earth Day Network
Denis Hayes
Earth  Day Network was founded by Denis Hayes and the organizers of the first  Earth Day in 1970 and by other national organizers, including Pam Lippe,  to promote environmental activism and year-round progressive action,  domestically and internationally. Earth Day Network members include  NGOs, quasi-governmental agencies, local governments, activists, and  others. Earth Day Network members focus on environmental education;  local, national, and global policies; public environmental campaigns;  and organizing national and local earth day events to promote activism  and environmental protection. The international network reaches over  19,000 organizations in 192 countries, while the domestic program  engages 10,000 groups and over 100,000 educators coordinating millions  of community development and environmental-protection activities  throughout the year.[39]
In observance of the 40th anniversary of  Earth Day, Earth Day Network created multiple global initiatives,  ranging from a Global Day of Conversation with mayors worldwide,  focusing on bringing green investment and building a green economy;  Athletes for the Earth Campaign that brings Olympic, professional, and  every day athletes' voices to help promote a solution to climate change;  a Billion Acts of Green Campaign which will aggregate the millions of  environmental service commitments that individuals and organizations  around the world make each year;[40] to Artist for the Earth, a campaign  the involves hundreds of arts institutions and artists worldwide to  create environmental awareness. EDN mobilized 1.5 billion people in 170  countries to participate in these global events and programs.
EDN has helped create Earth Day organizations worldwide.
[edit]Earth Day Canada
The  first Canadian Earth Day was held on Thursday, September 11, 1980, and  was organized by Paul D. Tinari, then a graduate student in Engineering  Physics/Solar Engineering at Queen's University. Flora MacDonald, then  MP for Kingston and the Islands and Canadian Secretary of State for  External Affairs, officially opened Earth Day Week on September 6, 1980  with a ceremonial tree planting and encouraged MPs and MPPs across the  country to declare a cross-Canada annual Earth Day. The principal  activities taking place on the first Earth Day included educational  lectures given by experts in various environmental fields, garbage and  litter pick-up by students along city roads and highways as well as tree  plantings to replace the trees killed by Dutch Elm Disease.[41][42]
Earth Day Canada logo
Earth  Day Canada (EDC), a national environmental charity founded in 1990,  provides Canadians with the practical knowledge and tools they need to  lessen their impact on the environment. In 2004, it was recognized as  the top environmental education organization in North America, for its  innovative year-round programs and educational resources, by the  Washington-based North American Association for Environmental Education,  the world's largest association of environmental educators. In 2008, it  was chosen as Canada's "Outstanding Non-profit Organization" by the  Canadian Network for Environmental Education and Communication. EDC  regularly partners with thousands of organizations in all parts of  Canada. EDC hosts a suite of six environmental programs: Ecokids,  EcoMentors, EcoAction Teams, Community Environment Fund, Hometown Heroes  and the Toyota Earth Day Scholarship Program.
[edit]History of the Equinox Earth Day
The  equinoctial Earth Day is celebrated on the March equinox (around March  20) to mark the precise moment of astronomical mid-spring in the  Northern Hemisphere, and of astronomical mid-autumn in the Southern  Hemisphere. An equinox in astronomy is that moment in time (not a whole  day) when the center of the Sun can be observed to be directly "above"  the Earth's equator, occurring around March 20 and September 23 each  year. In most cultures, the equinoxes and solstices are considered to  start or separate the seasons.
Unofficial Earth Day flag, by John McConnell: the Blue Marble on a blue field.
John McConnell in front of his home in Denver, Colorado with the Earth Flag he designed.
John  McConnell[43] first introduced the idea of a global holiday called  "Earth Day" at the 1969 UNESCO Conference on the Environment. The first  Earth Day proclamation was issued by San Francisco Mayor Joseph Alioto  on March 21, 1970. Celebrations were held in various cities, such as San  Francisco and in Davis, California with a multi-day street party. UN  Secretary-General U Thant supported McConnell's global initiative to  celebrate this annual event; and on February 26, 1971, he signed a  proclamation to that effect, saying:
May there be only peaceful  and cheerful Earth Days to come for our beautiful Spaceship Earth as it  continues to spin and circle in frigid space with its warm and fragile  cargo of animate life.[44]
United Nations secretary-general Kurt  Waldheim observed Earth Day with similar ceremonies on the March equinox  in 1972, and the United Nations Earth Day ceremony has continued each  year since on the day of the March equinox (the United Nations also  works with organizers of the April 22 global event). Margaret Mead added  her support for the equinox Earth Day, and in 1978 declared:
"Earth  Day is the first holy day which transcends all national borders, yet  preserves all geographical integrities, spans mountains and oceans and  time belts, and yet brings people all over the world into one resonating  accord, is devoted to the preservation of the harmony in nature and yet  draws upon the triumphs of technology, the measurement of time, and  instantaneous communication through space.
Earth Day draws on  astronomical phenomena in a new way – which is also the most ancient way  – by using the vernal Equinox, the time when the Sun crosses the  equator making the length of night and day equal in all parts of the  Earth. To this point in the annual calendar, EARTH DAY attaches no local  or divisive set of symbols, no statement of the truth or superiority of  one way of life over another. But the selection of the March Equinox  makes planetary observance of a shared event possible, and a flag which  shows the Earth, as seen from space, appropriate."[45]
At the  moment of the equinox, it is traditional to observe Earth Day by ringing  the Japanese Peace Bell, which was donated by Japan to the United  Nations.[46] Over the years, celebrations have occurred in various  places worldwide at the same time as the UN celebration. On March 20,  2008, in addition to the ceremony at the United Nations, ceremonies were  held in New Zealand, and bells were sounded in California, Vienna,  Paris, Lithuania, Tokyo and many other locations. The equinox Earth Day  at the UN is organized by the Earth Society Foundation.[47]
[edit]April 22 observances
[edit]Growing eco-activism before Earth Day 1970
In  1968, Morton Hilbert and the U.S. Public Health Service organized the  Human Ecology Symposium, an environmental conference for students to  hear from scientists about the effects of environmental degradation on  human health.[48] This was the beginning of Earth Day. For the next two  years, Hilbert and students worked to plan the first Earth Day.[49] In  the spring of 1970—along with a federal proclamation from U.S. Sen.  Gaylord Nelson—the first Earth Day was held.[50]
Project Survival,  an early environmentalism-awareness education event, was held at  Northwestern University on January 23, 1970. This was the first of  several events held at university campuses across the United States in  the lead-up to the first Earth Day. Also, Ralph Nader began talking  about the importance of ecology in 1970.
The 1960s had been a very  dynamic period for ecology in the US. Pre-1960 grassroots activism  against DDT in Nassau County, New York, had inspired Rachel Carson to  write her bestseller, Silent Spring (1962).
[edit]Significance of April 22
Senator  Nelson chose the date in order to maximize participation on college  campuses for what he conceived as an "environmental teach-in". He  determined the week of April 19–25 was the best bet as it did not fall  during exams or spring breaks.[51] Moreover, it did not conflict with  religious holidays such as Easter or Passover, and was late enough in  spring to have decent weather. More students were likely to be in class,  and there would be less competition with other mid-week events—so he  chose Wednesday, April 22.
Unbeknownst to Nelson,[52] April 22,  1970, was coincidentally the 100th anniversary of the birth of Vladimir  Lenin. Time reported that some suspected the date was not a coincidence,  but a clue that the event was "a Communist trick", and quoted a member  of the Daughters of the American Revolution as saying, "subversive  elements plan to make American children live in an environment that is  good for them."[53] J. Edgar Hoover, director of the U.S. Federal Bureau  of Investigation, may have found the Lenin connection intriguing; it  was alleged the FBI conducted surveillance at the 1970  demonstrations.[54] The idea that the date was chosen to celebrate  Lenin's centenary still persists in some quarters[55][56] although Lenin  was never noted as an environmentalist.
In Nebraska, Arbor Day  happens to fall on April 22, that being the birthday of Julius Sterling  Morton, the founder of the national tree-planting holiday that started  in 1872 and which has been a legal holiday in the state since 1885.  According to the National Arbor Day Foundation "the most common day for  the state observances is the last Friday in April ... but a number of  state Arbor Days are at other times in order to coincide with the best  tree-planting weather."[57] It has since been largely eclipsed by the  more widely observed Earth Day, except in Nebraska, where it originated.
[edit]Earth Day ecology flag
Ron Cobb's 1969 Ecology Flag with theta
Main article: Ecology Flag (American)
According  to Flags of the World, the Ecology Flag was created by cartoonist Ron  Cobb, published on November 7, 1969, in the Los Angeles Free Press, then  placed in the public domain. The symbol is a combination of the letters  "E" and "O" taken from the words "Environment" and "Organism,"  respectively. The flag is patterned after the United States' flag, with  thirteen alternating-green-and-whites stripes. Its canton is green with a  yellow theta. Later flags used either a theta or the peace symbol.  Theta would later become associated with Earth Day.
As a  16-year-old high school student, Betsy Vogel, an environmental advocate  and social activist who enjoyed sewing costumes and unique gifts, made a  4 x 6-foot (1.8 m) green-and-white "theta" ecology flag to commemorate  the first Earth Day. Initially denied permission to fly the flag at C.  E. Byrd High School in Shreveport, Louisiana, Vogel sought and received  authorization from the Louisiana State Legislature and Louisiana  Governor John McKeithen in time to display the flag for Earth  Day.[citation needed]
[edit]Criticism
Writer Alex Steffen,  proponent of bright green environmentalism, charges that Earth Day has  come to symbolize the marginalization of environmental protection, and  the celebration itself has outlived its usefulness.[58]
A May 5,  2009 editorial in The Washington Times contrasted Arbor Day with Earth  Day, claiming that Arbor Day was a happy, non-political celebration of  trees, whereas Earth Day was a pessimistic, political ideology that  portrayed humans in a negative light.[59]
The questionable nature  of companies and products involved in Earth Day related promotions has  led to accusations of greenwashing.[60]
[edit]Earth Day 2010
Earth  Day 2010 coincided with the World People's Conference on Climate  Change, held in Cochabamba, Bolivia, and with the International Year of  Biodiversity.