Major air pollutantsUrban environmentAir-quality trendsSeasonal variationsUrban air quality has been deteriorating over time. Pollutant distribution levels in the urban environment may be associated with anthropogenic sources and meteorological conditions. The aim of this......
pollution standard index (PSI)autoregressive integrated moving average (ARIMA)tehranakaike information criterion (AIC)and bayesian information criteria (BIC)In this study, the trends of Pollution Standard Index (PSI) and the levels of related air pollutants are analyzed based on the database monitored...
We (reduce) emission of air pollutants in recent years,but cars are still major source of them.(2020·浙江台州质检) 答案 答案have reduced/have been reducing解析 由句中的时间状语in recent years可知,应用现在完成时或现在完成进行时。 结果五 题目 9. We(reduce) emission of air pollutants inrecent...
aA: We have reduced emission of air pollutants in recent years, but cars are still a major source of them. Factories have become cleaner as stricter environment pollution law have been introduced. A : 我们近年来减少了空气污染物放射,但汽车仍然是一个主要来源的他们。 当介绍了,工厂变得更加干净更...
Based on satellite image data and China's Statistical Yearbooks(2000 to 2014), we estimated the total mass of crop residue burned, and the proportion of residue burned in the field vs.indoors as domestic fuel. The total emissions of various pollutants from the burning of crop residue were est...
This demonstrates that direct meta hydroxylation of the phenylalanine ring can occur at some stage during its catabolism. The time course for the production of the acid was similar to that of the ortho isomer and is consistent with formation in the......
awe have reduced emission of air pollutants in recent years, but cars are still a major source of them. Factories have become cleaner as stricter environment pollution law have been introduced. 我们近年来减少了空气污染物放射,但汽车仍然是一个主要来源的他们。 当介绍了,工厂变得更加干净更加严密的环境...
The abatement of major pollutants in air and water by environmental catalysis. Front. Environ. Sci. Eng. 7, 302e325. http:// dx.doi.org/10.1007/s11783-013-0511-6.Junhua;Li;Hong;He;Chun;Hu;Jincai;Zhao.The abatement of major pollutants in air and water by environmental catalysis.Frontiers...
Pollution Types 1. Air pollution (Sources—primary and secondary; major air pollutants; measurement units; smog; acid deposition—causes and effects; heat islands and temperature inversions; indoor air pollution; remediation and reduction strategies; Clean Air Act and other relevant laws) 2. Noise ...
The Effects of Intensive Supervision Mechanism on Air Quality Improvement in China by good air quality days (hereafter referred to as GAD) and the concentrations of six major air pollutants (i.e. PM2.5, PM10, O3_8H, NO2, SO2, and CO)), in China with focuses on the implementation cities...