He pointed out that global warming will cause large areas of alpine coniferous forest to disappear, causing many areas, including the American West, to go from being fertile to being barren. This will unleash furious conflicts over water and arable land, while simultaneously hundreds of millions of people will be displaced by rising sea levels.
他指出，氣候變遷將使大量的高山針葉林滅絕，使包括美西在內的多處沃土變成沙漠，從而引爆大規模的水源、可耕地等資源的爭奪戰，更有數以億計的人口將因海平面上升而被迫遷移。