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Unit 19: GLOBAL WARMING

Unit 19: GLOBAL WARMING

I. Bài đọc   It seems as if every time you turn on the television news, you hear one or the other of the following catchphrases of the 1990s: global warming, greenhouse effect, climate change. As it often is with catchphrases, hardly anyone knows what these terms really mean or how they relate to each other.  In the past 100 years, in our effort to make the Earth a more civilized place, industrial production has increased by fifty times. Four-fifths…

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