How did the agenda of grassroots organizations like the Sierra Club and the Wilderness Society change with the rise of the environmental movement in the 1970s?

They called for broader environmental protections

Explanation: Historically, these two groups had focused solely on conservation but with the rise of the environmental movement however, they changed their agenda to encompass wider environmental protections.

One major response to growing environmental concerns was a nationwide protest called Earth Day. On April 22, 1970, close to 20 million Americans took part in Earth Day events across the nation. The event attracted the support of many of the same people who had advocated civil and women's rights. It was also backed by a number of grassroots conservation groups, including the Sierra Club, founded by John Muir in 1892, and the Wilderness Society, established in 1935.

This was the period they expanded their agenda to adress more environmental issues asides conservation.

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