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
2024-04-25
68
管理
问题
Burning fallen leaves used to be standard practice across North America, but 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.
19. Why do most cities discourage burning fallen leaves?
20. Why can fallen leaves cause air pollutants?
21. What is the most eco-friendly way to deal with fallen leaves?
选项
A、Because it may cause fire accidents.
B、Because it may cause air pollution.
C、Because it may cause people out of breath.
D、Because it may cause water pollution.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3570237.html
相关试题推荐
[originaltext]ManyoftheDutchexpressionsheardinAmericanEnglishwere
[originaltext]ManyoftheDutchexpressionsheardinAmericanEnglishwere
[originaltext]ManyoftheDutchexpressionsheardinAmericanEnglishwere
[originaltext]BurningfallenleavesusedtobestandardpracticeacrossNor
[originaltext]Anelementaryschoolbusdriverpulledintoagasstationin
[originaltext]Anelementaryschoolbusdriverpulledintoagasstationin
[originaltext]W:Areyousurethatyou’llneedallthisstuff?Yourfatherand
[originaltext]W:ThebookthatwearegoingtotalkaboutiscalledTheGreekG
[originaltext]M:Idolikethosecolorfulbirds.Ithinkyoucanteachthemto
[originaltext]M:Idolikethosecolorfulbirds.Ithinkyoucanteachthemto
随机试题
WhatdowemeanbyaperfectEnglishpronunciation?Inone【C1】______therear
在得到更多细节之前,我想避免跟他说话。Beforegettingmoredetails,Iwanttoavoidtalkingtohim.
[originaltext]Moods,saytheexperts,arefeelingsthatarelikelytobefi
[originaltext]M:Hi,Jenny,youdon’tlookhappy.What’swrong?W:Well,Jack,
巨结肠病人可见A.腹部膨隆、上腹中部膨隆 B.腹部局部隆起、右上腹膨隆 C.
Thechangeinthatvillagewasmiraculou
各变电站应制定变电站消防器材布置图,标明检查时间、数量和消防器材类型,消防器材按
以下属于培训评估综合评估法的是( )。A.关键人物评估法 B.比较评估法
(2021年真题)商业银行的限额管理体系通常包括()。A.单一客户限额
商业银行可以在我国境内外设立分支机构,下列关于分支机构的说法,错误的是()。
最新回复
(
0
)