Lesson 141 Global Warming

    Have you noticed that it's getting warmer
and warmer every year? To put it simply
that's because of air pollution. Scientists tell
us that because of air pollution, the earth's
heat cannot escape. This is known as global
warming. If this situation is allowed to
continue, it will just keep getting hotter an
hotter. Then, can you imagine what will
happen? We should all, therefore, do our
part to stop polluting the air and help save
the world.
全球气温上升
    你有没有注意到天气一年比一年变得还要暖和了呢?简言
之，那是因为空气污染的缘故。科学家告诉我们由于空气污染，
地球的热气无法散出去。这就是为人所知的全球变暖。如果我们
任由这种情形一直持续下去，地球就会变得越来越热。那么，你
能想像会发生什么事吗?因此，我们全都应该尽一己之力来防止
污染空气并拯救地球。