环境问题 ENVIRONMENTAL ISSUES
allintitle: Google Web Searches filetype:ppt
1991 lectures
34 for allintitle: 酸雨 Acid rain
43 for allintitle: 大气污染 Air pollution
50 for allintitle: 气候变化 Climate change
1 for allintitle: 水坝 Dams
12 for allintitle: 沙漠化 Desertification
591 for allintitle: 能量 Energy
25 for allintitle: 能源节约 Energy conservation
8 for allintitle:遗传工程 Genetic engineering
15 for allintitle:温室气体 Greenhouse gas
16 for allintitle:重金属 Heavy metals
3 for allintitle: 非法采伐 Illegal logging
21 for allintitle: 灌溉 Irrigation
58 for allintitle:废弃物 Litter
15 for allintitle: 海洋污染 Marine pollution
21 for allintitle: 采矿 Mining
14 for allintitle: 纳米技术 Nanotechnology
13 for allintitle: 噪音污染 Noise pollution
57 for allintitle: 核能 Nuclear energy
4 for allintitle: 漏油 Oil spills
14 for allintitle: 臭氧 Ozone
5 for allintitle: 杀虫剂 Pesticides
761 for allintitle: 污染 Pollution
4 for allintitle: 海平面上升 Sea level rise
215 for allintitle: 土壤 Soil
21 for allintitle: 水土保持 Soil conservation
15 for allintitle: 毒素 Toxins
62 for allintitle: 废物 Waste
11 for allintitle: 废物处置 Waste disposal
67 for allintitle: 水污染 Water pollution
参考：
http://en.wikipedia.org/wiki/List_of_environmental_issues
受支配