土地污染英文版.ppt

Classification Agriculture (pesticide, fertilizer) Domestic pollution (garbage, feces) Industry (residue, exhaust, effluent) Transportation (heavy metals) Damage Measures * * * * * * * * * * * * Soil pollution Definition Soil pollution refers to the phenomenon that harmful and toxic substances caused by human activities enter into the soil, and when accumulated to a certain degree, more than self-purification capacity of the soil itself, it will give rise to changes in soil properties and quality, which impacts and threatens crops and human’s body. Pear orchard in Taiyuan produced “cancer” Rubbish Mountain 1.Human’s Health (food chain) Toxic substances Soil Animals Plants Human 2. Environment Deterioration of soil properties/ Vegetation to reduce/ Decreasing biodiversity/Water body pollution / radioactivity 3. Economic losses Soil repair/Crop yields down Now ! 1. Strengthen to the management of industrial waste gas, waste water, waste residue and comprehensive utilization, prevent any waste emissions containing a variety of pollutants into the soil. 2. Use pesticides and fertilizers reasonably, and actively develop high efficiency, low toxicity and low residue of pesticides 3. Dispose feces, garbage and sewage innocuously. 4. Promote sewage irrigation carefully. Monitor and control water used to irrigate fields strictly.