- UID
- 1520568
- 在线时间
- 小时
- 注册时间
- 2022-6-4
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
main idea: describe the chemical process of the ozone formation and points out the options to tackle
structure:
p1.government ban
-on "drive up" bank tellers and "drive through" MC
-aim: decrease the possibility of cars idling and thus reduce the pollution
p2.government strictly execute the clean air act for the first time
-the law born in. 1970 and set high standard for the air quality
-flaws: no definition on how the quality can be achieved and how to punish the offenders
-congress is trying to the law after failing to do so every year of the past decades
p3.the difference of this year
-companies, fearful of the punishment, support the proposed modification of the law
-merits: don't spend money on amendments but on cleaner xx
p4. the act details and current obstacle
-242 areas and 6 types of pollutants
-phenomenon: nearly all the areas achieved the standards of the first 4, 100 areas didn't meet the latter 2 standards
-carbon monoxide: 86% from vehicles- new car with clean engine can solve the problem
-ozone: more complicated
p5. features and impacts of ozone
-highly active, three oxygen atoms
-in high atmosphere, block the sun rays
-on ground, attack the lung tissue and weaken immune system
p6.the standard without agreement
-1970, 0.25 ppm in air, the act regulated 0.12 ppm as standard level
-ota comments: some say 0.14ppm, others say 0.8 ppm all day
p7.the process of ozone formation
- ultraviolet light breaks down the nd into no + o
-generally, o rapidly react with no and doesn't accumulate
-in organic gases, which are hydorcarbon, no can react without o, then o accumulates
p7. 80% carbon from vehicles while the rest is hard to regulate
-evaporation from factories and families fueling fluids
-2 options: clean the air after it absorbed the carbon or produce fewer carbon
new words:
dioxide: 二氧 monoxide: 一氧
ultraviolet: 紫外的
dispense with: 免除,无需 dispense: 分配,发放 this dispenses with x x x, allowing x x x x 什么免除了xxx, 结果允许了xxx
while they object to specific proposals as too costly, they are not spending large amounts of money on campaigns to block the amendments. 他们反对具体的方案,认为成本太贵,他们没有花费很多钱在阻止修正案的活动上。object to: 反对 ? |
|