TED演讲:对最近气候趋势的警告(1)
Last year I showed these two slides so that demonstrate that the arctic ice cap, 去年我给各位展示了两个关于北极冰帽的演示, which for most of the last three million years has been the size of the lower 48 states, has shrunk by 40 percent. 在过去三百万年中,其面积由相当于美国南方48州面积总和缩减了40%。 But this understates the seriousness of this particular problem because it...