土地荒漠化英语(土地荒漠化英语演讲稿)
Desertification土壤荒漠化,沙漠化 Drought control抗旱 Dry farming旱作 Biotopes群落生境 Tropical forests热带森林 Endangered plant species濒危植物物种 Temperate forests温带森林 Tropical ecosystems热带生态系统 Tropical forests。
Earthquake, volcano and tsunami, tornadoes, mudslides, desertification, drought, floods environmental pollution, destruction of atmospheric pollution。
As of 2003, land desertification in China has 2674 million square kilometers, accounting for 279% of the total land area, covering 18 provinces of the 471 counties Caused by desertification every year in。
1图画图表描述段As is shown in the picture, we can see clearly the relation ship between people and desert In the left hand picture, people are fleeing from greedy sand hills because they cut down。
land degradation土地荒漠化的主要原因人为活动地理环境因素和气候因素1人为活动人口增长对土地的压力,是土地荒漠化的直接原因干旱土地的过度放牧粗放经营盲目垦荒水资源的不合理利用过度砍伐森林不合理。
科学家门正试者再一次把沙漠变成好的土地他们正在学很多关于沙漠的知识,但是越来越多的土地也在不断的变成沙漠科学家们可能不能及时改变沙漠为什么会越来越多的土地边成沙漠呢是人类他们一直在做对地球有害的事。
poisonous chemicals pollution etc 1全球变暖臭氧层破坏酸雨淡水资源危机能源短缺森林资源锐减土地荒漠化物种加速灭绝垃圾成灾有毒化学品污染等众多方面2你认为人们在一千年内会克服哪些? 你认为哪。