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I haven't read all these posts, so this may have mentioned already, but what's the deal with the author's framing every environmentalists' story as a biblical tale? People seem to have an issue with sorting out where their emotions come from... Can Al Gore really MAKE you feel guilty about your habits, or do you just feel guilty because something inside you gets triggered by the information you are taking in?
Any vegetarians here will know the drill. Tell a meat eater that their diet has 10x the impact on the environment (even though they asked) and they tend to get a bit defensive. Did you MAKE them feel guilty? Or does calling yourself an environmentalist whey you make choices in direct conflict to them just produce those feelings... then the need to rationalize your behavior so you don't feel like a hypocrite? Guilt is a useful tool that helps keep our society in balance. It comes from the inside...