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In a world where millions are dying of hunger and disease, where floods and cyclones are ravaging villages, where refugees have nowhere to go, the biggest fund-raising worthy cause you've decided to go with is... travelling? If you think that a 15-day package trip to see glaciers and penguins will help deal with global warming, well done, you've managed to kid yourself. By all means do that trip. The trouble begins when you make generous, if gullible, people buy into the idea of needing to fund you for it.