The environmental problems of the world today seem to be getting out of hand: Climate change, acid rain, destruction of the ozone layer, sharp decrease of tropical forests, and desertification.

• 现在，全球范围内的环境问题似乎变得无法控制：气候变化，酸雨，臭氧层坡坏，热带雨林急剧减少以及沙漠化。