The heaviest, which shocked the world, was in 19 because of cold weather and windless conditions, polluted air covered the city.
最严重的是在19年，因为寒冷的天气和无风的条件，污染的空气覆盖了城市，这震惊了整个世界。
2
Not only are we bring about the extinction of life on a vast scale, we are also making the land, the air and the sea so toxic that the very conditions of life are being destroyed.
我们不仅使生物大规模灭绝，还令陆地、空气和海洋含有巨大毒性，从而使生物的生存条件遭到破坏。
3
Not only are we bringing about the extinction of life on a vast scale, we are also making the land and the air and the sea so toxic that the very conditions of life are being destroyed.