When I ponder the next big push for action on climate change, I think back to the late summer of 1969, just before Wisconsin Senator Gaylord Nelson vowed to organize a nationwide environmental teach-in.
At the time, the United States did not really have an environmental movement. Grassroots activism was diffuse and often unheralded. Polls showed that most Americans were concerned about pollution, but the issue was not a priority. The federal government had not yet acted boldly to clean up the natio...
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