首页
登录
职称英语
[originaltext] Burning fallen leaves used to be standard practice across Nor
[originaltext] Burning fallen leaves used to be standard practice across Nor
游客
2024-04-30
8
管理
问题
Burning fallen leaves used to be standard practice across North America, but(29)most districts now ban or discourage this practice due to the air pollution it causes.
What’s more, because of the moisture that is usually trapped within leaves, they tend to burn slowly and thus generate large amounts of particles in the air, such as bits of dust, smoke and other solid materials. These particles can reach deep into lung tissue and cause coughing, chest pain, shortness of breath and other breathing problems.
Individual leaf fires from time to time usually don’t cause any major pollution, but multiple fires in one geographic area can cause concentrations of air pollutants that exceed federal air quality standards. According to the U. S. Environmental Protection Agency(EPA), several leaf and yard waste fires burning simultaneously in a particular place can cause air pollution which equals that from factories, motor vehicles and lawn equipment.
On the contrary, leaves can be made fertilizer, which is the most eco-friendly alternative to burning. Dry leaves alone will take a long time to break down, but mixing in green plant materials, such as grass, will speed up the process. Sources of nitrogen, such as livestock wastes or commercial fertilizer, will also help.
Another option is to chop leaves for use as cover for your lawn or to help protect garden and landscape plants. But before you add no more than a two-to-three-inch layer of leaves around actively growing plants, chop the leaves first so they don’t prevent air from reaching roots.
29. Why do most cities discourage burning fallen leaves?
30. Why can fallen leaves cause air pollutants?
31. What is the most eco-friendly way to deal with fallen leaves?
选项
A、Because burning them may cause fire accidents.
B、Because burning them may cause air pollution.
C、Because burning them may cause people out of breath.
D、Because burning them may cause water pollution.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3577927.html
相关试题推荐
[originaltext]Likemanyworkingpeople,Ineveractuallycookanything—Iju
[originaltext]Likemanyworkingpeople,Ineveractuallycookanything—Iju
[originaltext]Lushisafamily-run,ethicalcompanythatinvents,manufactu
[originaltext]Lushisafamily-run,ethicalcompanythatinvents,manufactu
[originaltext]W:Canyoutellmealittlebitaboutyourcurrentproject?What
[originaltext]W:So,Matt,(19)we’retalkingaboutadjectivesthisweek,orqua
[originaltext]W:So,Matt,(19)we’retalkingaboutadjectivesthisweek,orqua
[originaltext]M:Comeon,Kate.Thesun’sshinning.Theflowersareblooming.M
[originaltext]M:Comeon,Kate.Thesun’sshinning.Theflowersareblooming.M
[originaltext]M:Comeon,Kate.Thesun’sshinning.Theflowersareblooming.M
随机试题
AstudyconductedbyanAustralianscienceagencyhasdiscoveredsignsthat
WhichstatementisNOTtrueaboutIrene?[br][originaltext]ArenewedTrop
Hisfathersuggestedhe______(尽快适应大学里的生活).shouldadapthimselftothecollege
根据《民法典》有关合同转让的规定,下列关于债权转让的说法中,正确的是( )。A.
甲生前立了两份遗嘱:一份自书遗嘱,将字画交给自己的徒弟;后一份公证遗嘱,将住房送
对于运输业来说,选择价值是营销人员所从事的( ),这一程序是战略营销的本质。
我国陆地边界全长( )。A、3.2万公里 B、2.28万公里 C、1.8万
张先生在2013年2月1日存入一笔1000元的活期存款,3月1月取出全部本金,如
舌色淡白,常见于A.湿热证 B.虚寒证 C.火热证 D.阴虚证 E.外感
2017年,农户李某家从事的乡村旅游业收入占全部家庭收入的25%,其余为农业收入
最新回复
(
0
)