Born from what TIME described in 1970 as a casual suggestion by Wisconsin Senator Gaylord Nelson, Earth Day was meant as neither protest nor celebration, but rather as “a day for serious discussion of environmental problems.”
What surprised Nelson — and others — was how much enthusiasm the idea engendered. On this day, April 22, 45 years ago, nearly 20 million Americans took Nelson up on his suggestion and turned out for the inaugural Earth Day events. These cropped up all over the country, on college campuses and in public places — including Central Park and New York’s Fifth Avenue, which was closed to traffic for two hours while 100,000 people staged a quiet, contemplative parade.
A dissonant combination of festivity and somber reflection pervaded the holiday. Environmentalists found themselves transformed into celebrities for a day, suddenly overrun with invitations to share their grim prognoses for the planet. As TIME wrote in 1970:
Along with educational lectures and nature walks, however, there were livelier, more dramatic demonstrations meant to draw attention to the need for environmental reform. According to the New York Times, some activists held “mock funerals of ‘polluting’ objects, from automobiles to toilets.” Per TIME, students at several schools collected piles of litter and then staged “dump-ins” on the steps of city halls and manufacturing facilities.
At San Fernando State College, a group of students offered rice and tea to passersby as a sample of the “hunger diet” they could expect in the future, when overpopulation led to worldwide famine.
Meanwhile, at Florida Technological University, some students held a mock trial for a Chevrolet charged with poisoning the air. Finding it guilty, they set about executing it with a sledgehammer — but according to TIME, “the car resisted so sturdily that the students finally shrugged and offered it to an art class for a sculpture project.”
Despite — or perhaps because of — their heavy-handed theatrics, these grassroots protests paid off. By the end of the year, Congress had authorized the creation of the U.S. Environmental Protection Agency.
By the following year, Earth Day had grown into Earth Week, and this time it was officially sanctioned by President Nixon. But the festivities were “cooler and saner” the second year, per TIME, which noted, “Instead of noisy confrontations, the 1971 ‘week’ that ended April 25 ran to practical matters, like arranging bottle pickups.”
Read more about the importance of the environment in 1970, here in the TIME Vault: Issue of the Year
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