冬季由于取暖的需要,在我国的北方,燃料的使用大幅度增加,而此时植物对二氧化碳的利用却相对减少,导致空气中二氧化碳浓度在局部区域有所升高。又由于日照时间缩短,植物的光合作用时间也相应减少,氧气的产生也就相对减少。此外,由于冬季空气相对静止的时间较长,工业、交通和生? Due to the need of heating in winter, the use of fuel in northern China has increased greatly. However, the utilization of carbon dioxide in plants is relatively reduced at this time, resulting in an increase in the concentration of carbon dioxide in the air in some areas. And because the sunshine time is shortened, the plant photosynthesis time is correspondingly reduced, the oxygen production is also relatively reduced. In addition, due to the relative stillness of winter air for a long time, industry, transport and hygiene?