人类活动也会对气候产生影响。如____会改善局地气候；过度砍伐森林会导致局地甚至全球气候的恶化。

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   My mother was telling me about how she and her family got their first television when she was a teenager. Of course, it was black and white. She said she only watched it at night. When I was young, we had only about 3 or 4 different channels. My brothers, my sisters and I would sometimes fight about which channel to watch. But we usually enjoyed the same shows.

   Nowadays, we can get hundreds of channels on TV. There are channels with old movies, cooking, fishing and so on. It's amazing! I wonder how much my brothers, my sisters and I would fight if we had hundreds of channels when I was a child. Of course, we had only one television set. These days I notice families with 2 or 3 or more television sets in their homes. I guess it stops people from arguing over which channel to choose.

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