环境问题作文（英文）300字就所在城市某一方面的环境问题进行评估

环境问题作文（英文）300字就所在城市某一方面的环境问题进行评估
环境问题作文（英文）300字
就所在城市某一方面的环境问题进行评估

环境问题作文（英文）300字就所在城市某一方面的环境问题进行评估
The major forms of pollution are listed below along with the particular pollutants relevant to each of them:
Air pollution, the release of chemicals and particulates into the atmosphere. Common gaseous air pollutants include carbon monoxide, sulfur dioxide, chlorofluorocarbons (CFCs) and nitrogen oxides produced by industry and motor vehicles. Photochemical ozone and smog are created as nitrogen oxides and hydrocarbons react to sunlight. Particulate matter, or fine dust is characterized by their micrometre size PM10 to PM2.5.
Water pollution, by the release of waste products and contaminants into surface runoff into river drainage systems, leaching into groundwater, liquid spills, wastewater discharges, eutrophication and littering.
Soil contamination occurs when chemicals are released by spill or underground leakage. Among the most significant soil contaminants are hydrocarbons, heavy metals, MTBE[7], herbicides, pesticides and chlorinated hydrocarbons.
Littering
Radioactive contamination, resulting from 20th century activities in atomic physics, such as nuclear power generation and nuclear weapons research, manufacture and deployment. (See alpha emitters and actinides in the environment.)
Noise pollution, which encompasses roadway noise, aircraft noise, industrial noise as well as high-intensity sonar.
Light pollution, includes light trespass, over-illumination and astronomical interference.
Visual pollution, which can refer to the presence of overhead power lines, motorway billboards, scarred landforms (as from strip mining), open storage of trash or municipal solid waste.
Thermal pollution, is a temperature change in natural water bodies caused by human influence, such as use of water as coolant in a power plant.
Air pollution comes from both natural and manmade sources. Though globally manmade pollutants from combustion, construction, mining, agriculture and warfare are increasingly significant in the air pollution equation.[8]
Motor vehicle emissions are one of the leading causes of air pollution.[9][10][11] China, United States, Russia, Mexico, and Japan are the world leaders in air pollution emissions. Principal stationary pollution sources include chemical plants, coal-fired power plants, oil refineries,[12] petrochemical plants, nuclear waste disposal activity, incinerators, large livestock farms (dairy cows, pigs, poultry, etc.), PVC factories, metals production factories, plastics factories, and other heavy industry. Agricultural air pollution comes from contemporary practices which include clear felling and burning of natural vegetation as well as spraying of pesticides and herbicides[13]
Some of the more common soil contaminants are chlorinated hydrocarbons (CFH), heavy metals (such as chromium, cadmium--found in rechargeable batteries, and lead--found in lead paint, aviation fuel and still in some countries, gasoline), MTBE, zinc, arsenic and benzene. In 2001 a series of press reports culminating in a book called Fateful Harvest unveiled a widespread practice of recycling industrial byproducts into fertilizer, resulting in the contamination of the soil with various metals. Ordinary municipal landfills are the source of many chemical substances entering the soil environment (and often groundwater), emanating from the wide variety of refuse accepted, especially substances illegally discarded there, or from pre-1970 landfills that may have been subject to little control in the U.S. or EU. There have also been some unusual releases of polychlorinated dibenzodioxins, commonly called dioxins for simplicity, such as TCDD.[14]
Pollution can also be the consequence of a natural disaster. For example, hurricanes often involve water contamination from sewage, and petrochemical spills from ruptured boats or automobiles. Larger scale and environmental damage is not uncommon when coastal oil rigs or refineries are involved. Some sources of pollution, such as nuclear power plants or oil tankers, can produce widespread and potentially hazardous releases when accidents occur.
In the case of noise pollution the dominant source class is the motor vehicle, producing about ninety percent of all unwanted noise worldwide.

Last night, I had a terrible dream. I woke up suddenly. I can't imagine that---my friends, come on protect the enviroment.
Let's plant more trees
Oh,where am I? Why does this place look so w...

全部展开

Last night, I had a terrible dream. I woke up suddenly. I can't imagine that---my friends, come on protect the enviroment.
Let's plant more trees
Oh,where am I? Why does this place look so wild? In my eyes,there isn't any color of green. There isn't any forest without leaving some tree stumps here and there. Oh,where should the animals go? What a pity! They are homeless. I can't hear birds singing in the trees. I can't see the lovely animals running after. And I breath hardly because of the unfresh air. The land is so poor,a lot of farmers live a poor life. Where,Where should I go?
Oh,no,no,I wake up. Good bless, it's only a dream,not real.I breath and breath,enjoy the fresh air. Just now I was nearly out of breath,How terrible! We have only one earth,we really have to protect our earth,and control the cutting of trees. Green is beautiful and full on hope. Let's plant more trees. And we could breath freshly and happily. We could love a happy life, as well as the animals.Protecting environment, benefiting human. We do this not only for us,but also for our generation.
Let's plant more trees

收起