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The technical progress, which has facilitated the population increase, on one hand has bettered the quality of life, but on the other hand it has caused negative effects on the natural habitat.
Nowadays the man goes by car.At this point we can observe that:
The houses are equipped with heating systems.
The industries emanate industrial waste that are very often noxious.
The atomic energy produces radiations which are detrimental to human health.![]()