That no country can claim for itself, 不属于任何国家
Two billion people depend on them for drinking water... 二十亿人靠喝这些河中的水生存
Coral reefs, for example, are extremely sensitive... 例如珊瑚礁
Hasn't been so high for several hundred thousand years. 二氧化碳浓度从来没有如此之高
It would have been inconceivable for 几年前 船只的出现
While we continue to dig for resources 但我们却继续攫取
For economic or demographic reasons, 或资源减少的缘故