A. Oxygen. B. Hydrogen. C. Sulfur dioxide. D. Helium. 相关知识点: 试题来源: 解析 C。解析:二氧化硫是空气主要污染物之一,它会导致酸雨等环境问题。A选项氧气是空气的重要组成部分且对生物有益。B选项氢气不是空气污染物。D选项氦气是稀有气体,不是空气污染物。反馈 收藏 ...
It’s not particularly noisy on the whole, but this is something to be aware of. The bottom line The Blueair Blue Pure 211+ Auto will suit most households. It’s a substantial air purifier, and offers first-rate air purification capabilities alongside a premium and simple-to-operate design...
Scaled down water tunnel experiments have been used to investigate the effectiveness of installing such a pollutant sink, of fixed dimensions, on top of a noise barrier adjacent to a highway. It is found that installing a sink is more beneficial on top of shorter barriers and that vertically ...
Air pollution in the Hindu Kush Himalaya (HKH) is on the rise and regional air quality has worsened in the past two decades, with the adjacent Indo-Gangetic Plains (IGP) having become one of the most polluted regions in the world. The causes include rapid urbanization and population growth,...
Our focus is on responses over land, as aerosols over ocean will have little health impact on people. We also perform an additional analysis centering on the eastern parts of China. This region includes the North China Plain, which is the most polluted district in China and has been studied...
Forestry social science is failing the needs of the people who need it most Rich nations’ fixation on forests as climate offsets has resulted in the needs of those who live in or make a living from these resources being ignored. A broader view and more collaboration between disciplines is...
The SE and NE sectors of the valley are used for agriculture, most of which is irrigated with residual waters from MCMA via the Tula River. Overall, the valley is site of considerable soil, water, and air pollution. Several lines of evidence have associated air pollution with health effects...
Here is a non-exhaustive list of what DailyBreath offers: • REAL-TIME Air Quality Data: Get up-to-the-minute information on air quality in your location, including pollutant levels, pollen counts, and mold. • PERSONALIZED Forecasts: Understand your personal risk with the DailyBreath Foreca...
Economist: The most economically efficient way to reduce emissions of air pollutants is to tax them in proportion to the damage they are likely to cause. But in Country Y, many serious pollutants are untaxed and unregulated, and policy makers strongly oppose new taxes. Therefore, the best way...
The analysis revealed the relationship between emissions and pollutant concentrations, and an empirical model is depicted in Eq. (1).(1)lny=klnx+cwhere x is the emission of NOx, CO, PM, and SO2 in the emission inventory; y is the concentration of air pollutants (NO2, CO, PM10, and ...