Indoor air pollution can be defined as chemical, physical and biological contamination of indoor air. In simple words indoor air pollution is the contamination of indoor air due to incorporation of substances (pollutants) which are not natural constituents of indoor air. Indoor air pollution is a ...
Wordsandphrases:coal,create,blood,planet,inmanyways,withthedevelopmentofindustry,highbloodpressureGrammar:thedifferencesbetweenthesimplepastandpresentperfect2.Difficultpoints:能根据关键词复述课文。能够进行同义句转换,用不同的短语表达相同的意思。Ⅲ.Learningstrategies能自己归纳总结所学的知识。学会利用关键词复述...
4.a tune.She played a simple air on the piano.aire verb 1.to expose to the air in order to dry or make more freshetc.to air linen.airear,ventilar 2.to make known.He loved to air his opinions.airear ˈairbagnoun a safety bag in a car that protects the driver or a passenger...
“barking incessantly in the night” 是定语修饰 “dog”;但 “rated the highest form of noise p...
Particle pollution, also known as particulate matter, is a major cause of death in cities like... 3 Pages | 1155 Words Air Pollution Effects on Children's Health Essay Air Pollution Children Perspective Every day around 93% of the world's kids under the age of 15 years (1.8 billion child...
In some respects, the situation parallels acid mine drainage. In other words, a massive accumulation of metals exposed at earth's surface will be a continuing source of metal pollution for decades for the foreseeable future. Industrial, Commercial, and Waste Disposal Sites Virtually every industrial...
On the mountain has the Chinese most characterful mountain lake - - in the clouds lake, has the national dropping variance biggest waterfall - - big top or projection of a cliff waterfall, has the preserved complete big area primitive secondary forest and the quaternary period glacier vestige -...
Point source: When the source of pollution is single, specified, and produces a significant amount of pollutants, this is known as a point source. In other words, point sources of pollution occur when the polluting substance is emitted directly into the waterway (Figure 4). Urban centers locat...
Pollutants damage the land, water, and air. In other words, they damage our environment. National Geographichas the following definition of the term: “Pollution is the introduction of harmful materials into the environment. These harmful materials are called pollutants.” ...
Words to Know Acid: Substances that when dissolved in water are capable of reacting with a base to form salts and release hydrogen ions. Acid rain: A form of precipitation that is significantly more acidic than neutral water, often produced as the result of industrial processes. ...