首页
登录
职称英语
[originaltext] Burning fallen leaves used to be standard practice across No
[originaltext] Burning fallen leaves used to be standard practice across No
游客
2023-08-31
48
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.
(30) What’s more, because of the moisture that is usually trapped within leaves, they tend to bum 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.
(31) 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.
选项
A、Burning them completely.
B、Keeping them where they are.
C、Changing them into fertilizer.
D、Using them to cover lawns.
答案
C
解析
文章中提到落叶可以用来做肥料,而且不妨碍生态环境。故本题答案为C 。
转载请注明原文地址:http://tihaiku.com/zcyy/2972995.html
相关试题推荐
[originaltext]EllenTaaffeZwilichisoneoftheclassicalmusiccomposers
[originaltext]Between1815and1915,morethan30millionimmigrantsarrive
[originaltext]W:Areyousurethatwe’llbesafe?M:Takeiteasy.Alltheski
[originaltext]W:Areyousurethatwe’llbesafe?M:Takeiteasy.Alltheski
[originaltext]W:Areyousurethatwe’llbesafe?M:Takeiteasy.Alltheski
[originaltext]M:I’vejustfoundthemostusefuldeviceatthatnewoutdoorsto
[originaltext]M:I’vejustfoundthemostusefuldeviceatthatnewoutdoorsto
[originaltext]ThereisoneforeignproducttheJapanesearebuyingfastert
[originaltext]ThereisoneforeignproducttheJapanesearebuyingfastert
[originaltext]ThereisoneforeignproducttheJapanesearebuyingfastert
随机试题
Thechangesinlanguagewillcontinueforever,butnooneknowssure【
YoucanneverimaginewhatgreattroubleIhavehad______thecustomertowithdr
小张购买股票且在持有收益达到20%时随即将股票出售,获得了一笔收益。体现了股票的
在某中学的一个学生宿舍里,照明灯突然熄了,同学们束手无策,叫来电工师傅,一看灯泡
被西方称为“物理学之父”,并提出“给我一个支点,我就能撬动地球”的名言的物理学家
2012年单项选择:下列属于古代医学所说的“五脏”是() A.心肝胃肺胆
治疗工伤所需费用符合工伤保险诊疗项目目录、工伤保险药品目录、工伤保险住院服务标准
管理是与人类的社会公共生活相伴而生的,这表明了管理是人类社会的()。A.基本
下列哪种患者禁用糖皮质激素A.严重哮喘兼有轻度高血压 B.暴发型流行性脑脊髓膜
男,30岁,由5m高处跌下2小时。腹痛,腹肌紧张,有压痛和反跳痛,肠鸣音弱。血压
最新回复
(
0
)