世界球日英文:Earth Day
Earth Day was first observed in Spring of 1970 An estimated 20 million people nationwide attended festivities out of which came the largest grassroots environmental movement in US history and the impetus for national legislation like the Clean Air and Clean Water Acts By the twentieth anniversary of that event April 22 1990 more than 200 million people in 141 countries participated in Earth Day celebrations
Former US Senator Gaylord Nelson Earth Day's cofounder modeled Earth Day on antiVietnam War demonstrations called teachins that were common on college campuses At a conference in Seattle in September 1969 I announced that in the spring of 1970 there would be a nationwide grassroots demonstration on behalf of the environment says Nelson The response was electric Telegrams letters and telephone inquiries poured in from all across the country As many as 20 million Americans participated in environmental rallies demonstrations and other activities in the 1970 Earth Day
Since the first Earth Day however the environmental movement has increasingly transformed itself from a largely grassroots citizen crusade to a professionallyorganized established special interest
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