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global warming
what is global warming ? over the last 100 years the average tempture of the air near the erths surface has risen a little less than 1 celsisus degree celsius makes the earth warmer .
* there data shows that an increase of one degree celsius makes the earth warmer * now that it has been for at least 1000 years
* out of the 20 years on record 19 have accured since 1980
but it is not only about how much the earths is worming it is also about how fast it is heating a damajing our world
there have always been natural climate changes like burming of trees using petrol and driving cars
