Many favorite vacation spots around the world are threatened by global warming. For example, the snow atop Mount Kilimanjaro may be around for just 15 more years and the glaciers in Glacier National Park in Montana may last just 70 more, according to recent studies. Would you like to travel to an uncomfortably hot and smoggy Paris — or a Martinique beset by hurricanes? “Global warming is a train wreck about to hit the world tourism business, and I think we’ve all been asleep at the switch,” says Jerry Mallet, president of the Adventure Travel Society, an international trade association. Tourists themselves are contributing big time to the problem, burning fossil fuels and adding carbon dioxide to the atmosphere with each new trip they take.

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