A modern city in the western world depends largely upon the generation and consumption of energy. We use wood and fossil fuels to supply our vast cities with energy but do not consider the environmental implications that are involved. We are depleting the earth of these fuels faster than they will be able to be formed and are also bringing great havoc to nature by causing global warming.
The "Greenhouse Effect" is the term used for the role the atmosphere plays in helping warm the Earth's surface. The atmosphere is largely transparent to incoming short-wave solar radiation, which is absorbed by the Earth's surface. Much of this radiation is then re-emitted at longer infrared wavelengths, but some of it is reflected back by gases such as carbon dioxide, methane, nitrous o
The environmental outlook for the future is mixed. In spite of economic and political changes, concern about the environment remains high. To reduce environmental degradation and for humanity to save its habitat, societies must recognise that the environment is finite. Environmentalists believe that, as populations and their demands increase, the idea of continuous growth must give way to a more rational use of the environment. This can be accomplished only by a dramatic change in the attitude of the human species. The human attack on the environment has been compared to the dramatic upheavals of the Earth in the geological past; whatever a society's attitude may be towards continuous growth, humanity should recognise that this attack threatens human survival. We need to fi
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