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
2024-05-08
23
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:https://tihaiku.com/zcyy/3589261.html
相关试题推荐
[originaltext]Asyoupreparetobecomeelementaryschoolteachers,you’llb
[originaltext]BurningfallenleavesusedtobestandardpracticeacrossNo
[originaltext]BurningfallenleavesusedtobestandardpracticeacrossNo
[originaltext]W:Allright,thatcomesto$20.75.Doyouhaveoneofourstore
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
[originaltext]Thenewyearalwaysbringswiththeculturaltraditionofnew
[originaltext]Thenewyearalwaysbringswiththeculturaltraditionofnew
[originaltext]Researchindicatesthatparentswhorewardself-controlandi
随机试题
Thispartistotestyourabilitytodopracticalwriting.Youarerequiredtow
泰罗科学管理所要解决的中心问题是()。A.提高劳动效率 B.资源配置 C.
A. B. C. D.肾小球滤过率降低 E.
关于项目风险的描述,不正确的( )。A.已知风险与未知风险都可以进行管理 B
下列各项中,()是一种法定的垄断权,其他企业及个人未经专利权人的许可,不能
男,29岁,高处坠落2小时后送至医院,主诉腰背部疼痛,双下肢不能活动经正确的治疗
简述现代企业人力资源管理各个历史发展阶段的特点。
会议决定,《城市生活无着的流浪乞讨人员救助管理办法(草案)》经进一步修改后,国务
下列关于保险诈骗罪的说法,正确的有( )。A.侵犯的客体是复杂客体,既侵犯了国
甲企业是一家跨国公司,为了进入A国市场,其与A国本地的乙公司结成合作关系,形成战
最新回复
(
0
)