【答案解析】Politicians everywhere deplore global warming, but they do little. To reduce CO₂ emissions significantly, Europeans would have to suppress car and electricity use, that would depress economic growth and fan popular discontent. That's why the politicians are reluctant to do so. Politicians, worldwide, have only one purpose, that is to brandish their environmental credentials. Even if rich countries actually curbed their emissions, it wouldn't matter much. Poor countries would offset the reductions. Poor countries won't sacrifice economic gains to combat global warming. By 2030, the IEA predicts, world energy demand and greenhouse gases will increase by roughly 60%; poor countries will account for about 2/3 of the growth.