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2017四川剑阁县高考英语阅读理解一轮编练 2016高考训练题。阅读理解。 阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。 Even before there were people, there were cases of air pollution. There were dust storms. Volcanoes erupted, sending ash and poisonous gases into the atmosphere. When people appeared on the scene and began their conquest of nature, they also began to pollute the air. They cleared land, which made possible even larger dust storms. They built cities, and the soot(煤烟) from their hearths filled the air. The Roman author Seneca wrote in AD 61 of the “stink, soot and heavy air” of the imperial city. In 1257, the Queen of England was forced to move away from the city of Nottingham because the heavy smoke was unbearable. The industrial revolution brought even worse air pollution. Coal was burned to power factories and to heat homes. Soot, smoke, and sulfur dioxide(二氧化硫) fill the air. The good old days? Not in the factory towns. But there were large rural areas unaffected by air pollution. With increasing population, the entire world is becoming more urban. It is the huge cities that are most affected by air pollution. But rural areas are not unaffected. In the neighborhoods around smoky factories, there is evidence of increased rates of spontaneous abortion(自然流产) and of poor wool quality in sheep, decreased egg production and a high death rate in chickens. | 
