The Sierra Club has pretty much kept its hypocritical mouth shut about illegal immigration and its impact on the environment. They don't want to rock any boats.
Sierra Club Revisits Issue of Immigration
April 12, 2005
A year after a bitter election for the board of the Sierra Club that focused on candidates' stands on immigration, the issue is now before the membership, this time as a ballot initiative.
Neither side said it expected a victory for the proposal, which would commit the club to support "lower limits on migration to the United States to address our nation's rapid population growth and its harmful effects on the domestic and global environment."
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Last year, the debate was tainted with allusions to racism and character assassination, and although a taste of that vitriol was evident in interviews with the chief combatants, the comments and the contest this year have a pro-forma feel.
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There are a lot of articles here at Google.
Now I see the problem!....from your google link:
RE:Sierra Club
Probably even more importantly, recommendations to vote for the New Old Guard were also sent by MoveOn.org, the Democratic outreach organization, to its 2.3 million members. MoveOn was recently in the news for receiving a matching grant of $5 million from open-borders billionaire George Soros.
One of the interesting facts which came to light during the election was the curious—and still mysterious—contribution of $100 million to the organization, brought to light by Dick Lamm and other reformer candidates. Was the cash a generous shovelful from extremist George Soros? Or did it come from the Mexican government in return for a promise to avoid the annoying immigration topic?
The Sierra Club had already supported California drivers' licenses for illegal aliens in the state—hardly an environmental issue—so a trans-border expansion would not be out of bounds from their viewpoint.
http://www.vdare.com/walker/sierra_club_toxifies.htm