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global warming few people now question the reality of global warming and its effects on the worlds climate. many scientists ______ the blame for recent natural disasters on the increase ______ the worlds temperatures and are convinced that, more than ______ before, the earth is at ______ from the forces of the wind, rain and sun. ______ to them, global warming is making extreme weather events, ______ as hurricanes and droughts, even more ______ and causing sea levels all around the world to ______ . environmental groups are putting ______ on governments to take action to reduce the ______ of carbon dioxide which is given ______ by factories and power plants, thus attacking the problem at its source. they are in ______ of more money being spent on research into solar, wind and wave energy devices, which could then replace existing power ______ some scientists, ______ , believe that even if we stopped releasing carbon dioxide and other gases into the atmosphere tomorrow, we would have to wait ______ hundred years to notice the results. global warming, it seems, is here to stay. 51. a. position b. practice c. blame d. question 52. a. at b. by c. in d. about | 
