【正文】 seriously disrupts DNA replication, causing reproductive failure and death. Relatively small increases in UV radiation can cause mutations during the replication process that may result in the production of cancerous cells. A major concern is the potential damage caused by UV light to plants. Which could reduce primary productivity, and therefore affect whole ecosystems. The importance of the ozone shield Chlorofluorocarbons (CFCs) can degrade ozone in the stratosphere. Attention was focused on the problem when the British Antarctic Survey demonstrated a strong depletion of the Antarctic ozone shield. It is estimated that a single chlorine atom can breakdown 10 000 ozone molecules. If the trend of ozone loss continues it is predicted that the ozone shield will be depleted by a further 10% by 2050。早期表現(xiàn)為咽痛、咳嗽、胸悶、氣短、頭暈、惡心、全身酸痛、無力、發(fā)熱等，嚴重時可出現(xiàn)中毒性肺水腫或化學(xué)性肺炎，中毒者高度呼吸困難，咯大量泡沫血色痰，可因急性呼吸衰竭而危及生命。 水污染 A range of chemical cause soil pollution problems, of which halogens (primarily solvents and pesticides) constitute the largest group. These chemicals are manufactured. The most plex group of pounds which are found polluting soils include polymers such as nylon, plastics and rubber. Bioremediation is a technique of utilizing microanisms for the decontamination of polluted soils. Soil pollution Related topics The properties of water (D1) Greenhouse gases and global Soil formation, properties and warming (W2) classification (G3) Ozone depletion (W3) 土壤污染 在導(dǎo)致土壤污染問題的一系列化學(xué)物質(zhì)中，鹵素（主要是溶劑和殺蟲劑）構(gòu)成了最大的一類。污染物可直接進入大氣（初級污染物），或在太陽輻射的影響