分析雾霾成因的材料文字可用于环保类、健康类、人类与自然关系类的作文。贴合现实、与时俱进，这才是逼格高的文章!
Research shows the burning of coal to provide central heating is one of the main reasons for the increase of particulate matter in the atmosphere which causes smog.
;而微粒物质是引起雾霾的罪魁祸首。
Fossil fuels account for as high as about 90 percent of all energy sources in China, which is the highest in the world. Worse, coal accounts for 65 percent of China's total energy consumption while the share of natural gas is just 6 percent. In contrast, the percentage of coal and natural gas is about 32 and 24 in the US. Consider this: to produce the same amount of heat, coal lets off double the volume of emission than natural gas.
在中国，高达90%的能源均来自于化石燃料，这也是全球最高的比例。更糟糕的是，煤炭占到了中国全部能源消耗的65%，而天然气仅占6%。相比之下，煤炭和天然气在美国的能源消耗中分别占到了32% 和24%。我们需要考虑这一事实：在产生相等热量的条件下，煤炭的污染物排放量两倍于天然气。
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