Did you know that the latest science shows that the part of the Amazon rain forest, planet Earth's richest biome on terrestrial land, has already tipped over and is no longer a carbon sink?

您是否知道，最新的科学研究表明，地球陆地上最丰富的生物群落——亚马逊雨林的一部分已经倾覆并且不再是一个碳汇？