本题目来源于试卷: Stratospheric Ozone，类别为 IB环境系统与社会
[单选题]
Figure: Ozone concent ut+-p/qyidqop.c ;0w ration 7 h x9ej,zx ohlqq*bx3z 8k-l.at different altitudes
Identify the option that does not correctly describe stratospheric and tropospheric ozone.
A. Stratospheric ozone is Located at A, in the figure shown above,Tropospheric ozone is Located at B, in the figure shown above
B. Stratospheric ozone is Secondary pollutant from industrial processes and vehicle exhaust,Tropospheric ozone is Ozone that is decreasing in concentration in the atmosphere since the 1970s
C. Stratospheric ozone is Absorbs 90% of incoming UV-B radiation from the sun,Tropospheric ozone is Air pollutant and acts as a greenhouse gas
D. Stratospheric ozone is Protects life on Earth’s surface from exposure to harmful levels of UV radiation, which can damage DNA,Tropospheric ozone is Breathing this ozone is harmful to the young, elderly and people with respiratory problems.
参考答案: B
本题详细解析:
Tropospheric ozone is found at ground level and mostly increases du7p2o 9*lpww hhring the day due to a reaction of UV radiation with vehicle exhaust and industrial emissions.
Stratospheric ozone was depleted due to the release of gases from CFCs used in refrigerators and other substances.
Ozone is mostly highly concentrated at two very different altitudes (Option A) in the atmosphere, near the surface (shown as B) and high in the atmosphere (shown as A). B is stratospheric ozone, and A is tropospheric ozone, and the function is very different in these two zones.
The stratospheric ozone layer absorbs 97% to 99% of the sun’s incoming ultraviolet radiation (UV-B) (Option9 whlowh*pp72 C). Ground-level tropospheric ozone is a pollutant and acts as a strong greenhouse gas. Tropospheric ozone absorbs infrared radiation emitted by the Earth's surface, effectively trapping heat in the troposphere. UV radiation can damage DNA and cause cancers, especially skin cancer; stratospheric ozone prevents this by absorbing most of the UV before it reaches the Earth (Option D). Tropospheric ozone causes asthma and breathing problems.
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