One, soil destruction.
According to the reference news, 110 National arable fertile decreases in magnitude. In Africa, Asia and Latin America, by forest vegetation in forest vegetation disappeared, land overdevelopment and pasture over-grazing, the situation of soil erosion is very serious. plastic bags Bare land become vulnerable, not long-term against wind and rain erosion. In some places, the soil loss of up to 100 tons per hectare. Of chemical fertilizer and pesticide use too much, and air pollution related to toxic dust slurry spraying landing, everywhere, everywhere abandoned hazardous waste, all of these are in the form of land is generally irreversible fouling.
Soil fertility, refers to the land surface has to grow plants of loose surface, the thickness of about 2m. The soil is not only for plant growth to provide mechanical support, and for the plant growth needed to provide water, fertilizer, gas, heat fertility factor. In recent years, due to rapid population growth, the rapid development of industry, solid waste piled up unceasingly to the soil surface and dumping of hazardous waste, unceasingly to the soil infiltration, the harmful gas in the atmosphere and dust have been landed with the rain in the soil, causing pollution of the soil. That hinder the normal function of soil, reduce crop yield and quality, but also through the grain, vegetables, fruits and so indirectly affect human health, called the soil pollutants.
Two, climate change and energy waste of the greenhouse effect is a serious threat to the human beings.
According to the 2500 representative of the experts predict, the sea level will rise, many populated areas ( such as Bangladesh,costume jewelry China coastal zone and the Pacific and India Ocean on most of the islands ) will be submerged in water. Temperatures will also bring serious effect agriculture and ecological system. According to the estimate, the 1990-2010 years, Asian and Pacific energy consumption will increase one times, the Latin American energy consumption will increase 50%-70%. Therefore, the western and developing countries should strengthen energy saving technology transfer process. We should use economic incentives, the industrialist who developed to improve industrial efficiency of resource utilization technology.
