That is to say, of all life on earth. 也就是地球上的一切生命

147. They are the cornerstone of the climatic balance...
     是我们赖以生存的
148. On which we all depend.
     气候平衡的基石
149. Trees provide a habitat for three-quarters of the planet's biodiversity
     树木提供地球四分之三生物种族的栖息地
150. That is to say, of all life on earth.
     也就是地球上的一切生命
151. Eeveryyear, we discover new species we had no idea existed
     每年我们都能发现一些未知的新物种
152. Insects, birds, mammals.
     昆虫 鸟类 哺乳动物
153. These forests provide the remedies that cure us.
     森林提供医治我们的药物

来自《家园 第二部分 Home Part2》第 150 行