Evil environmental harm to humans mainly the loss of health, labor productivity and other harms. Health, human happiness is reduced due to illness and premature death, because degradation of air and water quality, because of other environmental dangers. These pollutants can give rise to health problems, directly or indirectly due to changes the physical environment, its impact extends from the increased radiation of sunlight to reduce nutrient Street. Impaired health reduces productivity of human and environmental degradation reduces the performance of the many resources that people use directly.
Like many developing countries in the world, water forest It was destroyed so quickly. Within 50 years, our country's forest cover has been reduced by more than half, from 19 million hectares to 9 million hectares, an average annual reduction of 200 thousand hectares. The cause of this situation, in addition to logging and forest products indiscriminately, even as demand for food rapid population increase requires deforestation expanding cultivated area. Some ethnic minority groups with shifting cultivation, nomadic, after burning out into the forest upland planted only two or three cases that had to move to another new deforestation for cultivation. The process repeated itself over all other life to make natural forests are shrinking rapidly. Forests are not only a source of timber, but also social functions and extensive ecosystem. Forest area declined, bare land, barren hills rise as more floods.
Ecosystem estuary is an area of great significance and is subject to the volatility of both weak natural and man-made factors. People are the main reason to damage the coastal environment. The estuaries and rivers suffer from pollution by sewage from populous cities, factories, industrial plants, due to oil exploration in the continental shelf, loading and unloading, particularly products oil from the ports. The indiscriminate exploitation of mangroves to build aquaculture ponds, construction timber, provide firewood and coal ... If resources, exploitation of minerals is not reasonable to environmental damage , causing adverse consequences to the economic development and people's health life. The greatest impact of mining on the environment is in the mines, waste dumps, toxic gases, dust and waste water. Landfill without treatment works has gone to fill fields, gardens, rivers and streams, causing water pollution, dust
đang được dịch, vui lòng đợi..