Air Pollution in World

Air Pollution, contamination of the atmosphere by gaseous, liquid, or solid wastes or by-products that can endanger human health and the health and welfare of plants and animals, or can attack materials, reduce visibility, or produce undesirable odors. Among air pollutants emitted by natural sources, only the radioactive gas radon is recognized as a major … Read more

Sustainable development

By the year 2200 there will be a lot more people living on this planet then there are now. Estimates range anywhere from 15 to 36 billion people. Where will these people live? How will they live? The answer is sustainable development. Sustainable development, “meets the needs of the present without compromising the ability of … Read more