A. something that makes the air clean B. something that is good for the environment C. something that causes pollution D. something that is very beautiful 相关知识点: 试题来源: 解析 C。“pollutant”是污染物的意思,A 选项使空气干净的东西不对;B 选项对环境有益的东西不对;D 选项非常美丽的东...
[听力原文] 24-29 How much can you say about air pollutant At first let’s have a look at a useful definition of it. A pollutant is a compound added directly or indirectly by humans to the atmosphere, and in such quantities to adversely affect humans, animals, vegetations or materials. ...
Pollutants may be natural or anthropogenic. If something is anthropogenic, it originates from human activity. Volcanic ash, for example, is a natural pollutant, while fumes from vehicles are the result of human activity. Pollutants damage the land, water, and air. In other words, they damage ...
PU Foam As An Environmental Pollutant First, the Environmental Protection Agency (EPA) identifies polyfoam manufacturing facilities as a potential major source of hazardous air pollutants (source). They include methylene chloride, hydrochloric acid (HCl), 2,4-toluene diisocyanate (TDI), and hydrogen...
Viscose fabric is durable and soft to the touch, and it's one of the world's most beloved textiles. But what exactly is viscose fabric, and how is it produced and used? What Is Viscose? Viscose, which is also commonly known as rayon when it is made into a fabric, is a type of...
Air pollutants can be classified as either primary or secondary pollutants. 1. What is the difference between these types of pollutants? 2. Provide at least two examples of each type of pollutant. Describe the negative effects of pollutants on crops, fores...
An air cleaner, also known as anair purifier, is an appliance that cleans the air by removing impurities. An air cleaner can clean the air in a single room, a whole house or an industrial workspace. Air cleaners are employed in situations where the air typically becomes unhealthy due to ...
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Most notably, a tier 5 data center would meet all of the standards set forth by tier 4 while meeting additional sustainability standards. The additional tier 5 standards would require the ability to run the network without water, an outside air pollutant detection system, permanently installed ...
Environmental coating problems : Exactly what is a hazardous air pollutant?doi:10.1016/S0026-0576(97)80701-5RonJosephSDOSMetal FinishingJoseph R., Environmental Coating problem: Exactly what is a hazardous air pollutant? Metal Finishing, 95, 10, 1996, pp. 86-87....