I was a member of the Sierra Club for years and years. I quit a while ago. They still send me letters all the time with offers to rejoin. I still believe in their overall mission. Actually, I don’t know very many people who do not want clean air, clean water, and some undeveloped land. But I am no longer a member, and will not become a member because they are hypocrites. If you read the Sierra Club magazine, you’ll see a quarter of it (at least) is devoted to eco-travel. They promote sending plane loads of affluent westerners to ecologically sensitive areas of the planet on tours. Last time I looked, planes sucked enormous amounts of fuel and and are not emission-free. Then there’s the fuel and resources used to keep those tourists in comfort once they are there. If they’re serious about saving the planet, they should not be promoting this kind of travel. Sure, the tour operators claim to be ecologically sensitive, but common sense tells me that just leaving the most ecologically sensitive portions of the planet alone is probably the best policy.