填空题 Because people have been paying too much attention to the sulphur particles and other pollutants, they overlooked another problem, global warming.
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【正确答案】 1、Y    
【答案解析】根据题干中的sulphur particles and other pollutants,定位到第一个小标题下的最后一段中的第一句话 The global warming would be more pronounced if it were not for sulphur particles and other pollutants that shade us...,也就是说因为关注了硫化物和其他污染源,所以人们忽视了温室效应和全球变暖这个问题,认为这个问题并不紧迫。