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建立人际资源圈Acid_Rain
2013-11-13 来源: 类别: 更多范文
Acid Rain
Acid Rain
Imagine that you are dying, simply because you ate a fish. This death is a result of acid rain. Acid rain is a silent murder in todays ecosystems. The effects of acid rain on the ecosystem can be deadly.
Acid rain is all the rain, snow, mist that falls from the sky onto our planet that contains an unnatural low pH level. It is not to be confused with uncontaminated rain that falls, for that rain is naturally slightly acidic. This acid rain is a product of todays industry. When products are manufactured, many chemicals are used to create it. However, because of the difficulty and cost of properly disposing these products, they are often emitted into the atmosphere with little or no treatment.
The term was first considered to be important about twenty years ago when scientists in Sweden and Norway first believed that acid rain may be causing great ecological damage to the planet. By the time the scientist found the problem, it was already very large. Detecting an acidic lake is often quite difficult. A lake does not become acidic over night. It happens over a period of many years, some times even decades. The changes are usually
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