【答案解析】Even though politicians constantly warn of the grim future of the global warming, they can't (and won't) do much about it. European countries seem to embrace the Kyoto Protocol, and they have contempt for the United States and George Bush for not doing so. But the fact is, from 1990 to 2002, global emission of carbon dioxide (CO₂), the main green house gas, increased 16.4%. The U. S. increase was 16.7%, and most of Europe hasn't done much better.