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
18
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/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
Thoseofusinvolvedintheinternationalizationofhighereducationrelyo
[originaltext]SpeakingattheBritishScienceFestivalonTuesday,ProfKel
TheInternethasbecomemorewidelyused,anditisespeciallypopularwith
[img]2016m3x/ct_eyyjsbz2013c_eyyjsbcloze_0016_20163[/img]Greyhoundracingi
Thefoodweeatseemstohaveprofoundeffectsonourhealth.【C1】______sc
Advertisementsappeareverywhereinmodernsociety.Therearemanywaystoa
下列关于期间费用的会计处理中,正确的有()A.董事会会费应计入管理费用 B.销
运维人员应严格执行相关规程规定和制度,完成所辖变电站的现场(____)、设备巡视
企业战略管理的最高任务是( )。A.提高企业的市场占有率 B.追求企业利润最
男性,64岁。1年多来常于劳累或情绪激动时发作性左胸前区疼痛,多次心电图检查未见
最新回复
(
0
)