【简答题】London has always been known for its 'black fogs'. In the winter of 1952, a milky white fog rolled into the city. As the smoke poured into the air, it was so hard to see that people had to walk in fro...
【判断题】The tale of polluted London has been a very long one, spanning well over two centuries. Beijing cannot take that long; it would be a catastrophe for China and indeed for the whole planet.