The 550,000 U.S. members of the Sierra Club are deciding whether to take a stand against human migration patterns. They are now voting on whether to favor efforts to slow the flow of immigrants to the United States, or to remain neutral on the issue.
Supporters say overpopulation caused by immigration hurts the environment.
Opponents, however, say the measure is racist and xenophobic. The proposal would require the environmental group to develop a policy advocating immigration restrictions and to lobby Congress on the idea. Member have until April 18 to return their ballots. Among those backing a reduction in immigration are Gaylord Nelson, founder of Earth Day, and Stewart Udall, a former Interior secretary. The Sierra Club leadership wants to maintain the status quo.