environment(环境问题).ppt

Environment Songqi 10/3/2017 1 china has been enjoying digit growth for years. But the fast development comes at a price of environmental degradation.It will be a long and arduous task for the country to protect and improve the environment,but if we dont do it now, our children and grand-children would have little left to hold on to for a good and healthy life. Analysts say the shift to a low-carbon economy will be an inevitable choice for China to achieve a more sustainable development. 10/3/2017 2 10/3/2017 3 content 10/3/2017 4 chapter1.soil pollution Due to population explosion and industrial prosperity, solid waste continue to dump on the soil surface ,hazardous waste water permeate continuously to the soil, harmful gases and particulates has been landed with the rain in the soil, resulting in the contaminated soil. The most common soil pollutants are hydrocarbons, heavy metals(cadmium, lead, chromium, zinc, mercury and arsenic), herbicides, pesticides, oils, tars and dioxins. 1.1Defination of soil pollution 10/3/2017 5 10/3/2017 6 chapter1.soil pollution Our food comes from soil, so soil pollution will definitely engager our health. For example, certain cancers, birth defects, dysfunctional immune and diminished intelligence. 1.2 hazard of soil pollution 10/3/2017 7 chapter1.soil pollution Cadmium rice issue in 2013! The rice ,Guangdong people purchased from Hunan, was detected large number of cadmium toxicity in May 2013. This issue caused great panic in public. 1.2 hazard of soil pollution 10/3/2017 8 chapter1.Soil pollution 1.3 management of soil pollution biological repair生物修复 Using microorganism(微生物) to control soil organic pollution Using plant to repair soil pollution of heavy metals 10/3/2017 9 chapter2.Solid waste pollution Solid waste means abandoned materials in solid, semi-solid state coming from production, construction, everyday life and other activities and causing environmental pollution 固体废物，是指在生产建设、日常生活和其他活动中产生的污染环境的固态、半固态废弃物质。 2.1Defi