1) excess of land。GarbageIf left open, it would encroach on large amounts of land. The waste stays in nature for a long time, e. G. Cigarettes, wool fabrics for 1-5 years; orange skin for 2 years; cans of jars for 80-100 years; plastics for 100-200 years; glass for 1000 years。
2) contamination of air. Waste is a complex mixture. During transport and open dumps, organic matter decomposition causes stench and releases large amounts of pollutants such as ammonia and sulphides to the atmosphere, which contain more than 100 airborne volatile gases and contain many carcinogenic and teratogenic substances. Plastic membranes, paper chips and dust fly with wind to form “white pollution”。
3) contamination of water bodies. Hazardous components of waste are easily washed into surface water bodies by rain, and large amounts of acid and alkaline organic pollutants are generated during landfills or landfills, while heavy metals in waste are dissolved. Waste is dumped directly into rivers, lakes or oceans, leading to more serious pollution。
4) security risks. The waste contains a large amount of organic matter and produces gas that is flammable, such as methane, during natural stacking, and is prone to spontaneous combustion or explosion at a fire source under sealed conditions at a certain methane concentration, causing significant damage。
5) dissemination of diseases. In addition to containing pathogenic microorganisms, litter is a source of infectious diseases as well as a site that provides food, shelter and breeding for rats, birds and mosquito flies。
