Translations of Encyclopedia about Geology

For many thousaands of years, humans were a component of natural ecological systems of the earth. When humans began to live a sedentary life, they developed through creation of cultural laandscape new ecological systems of their own..

When more than 500 000 years ago humans started to use fire, wood was the most important source of energy. Approximately in the 18th century humans began to use fossil fuels. At that time, first steam machines were developed, signalling the beginning of the technological development. Today, all around the world every existing type of energy is being exploited, which requires large investments. This causes heavy burden on the environment, aand this trend is constantly increasing. Toxic matters, originating in the industrial aand agricultural wastes, pollute underground waters, soil, aand oceans.

Industrial fuel-burning processes used in manufacture of many natural aand synthetic materials produce toxic gas emissions, which support the greenhouse effect aand produce smog.

Acid rain, which is one of the products of the automobile exhaust gases aand of the coal burning, damages our forests aand rivers. Forests are dying out, a situation that has a far-reaching impact on plants, people, aand animals The balanced state of the waters of the past is losing its equilibrium due to numerous foreign aand toxic materials penetrating into the water table. This decimates the fish population, aand the situation is so serious, that some of the kinds of commercial fish became extinct.

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