1. Gold Mining craft with the most simple means, such as gold ore mixed with mercury, this mixture will be melted, vaporized mercury, substance remains is gold. Consequently, the operator inhaling toxic gases, mercury waste also pollute the environment, accumulate in plants, animals, and from there spread to the food chain. 2. Pollution of surface water increased population and water resources increasingly scarce and heavily polluted. Humans can be infected by drinking water or eating contaminated food. 3. Groundwater Pollution In urban areas, the choice of location or dump toilet waste as well not so toxic as well as pathogens can leach into groundwater. In addition, waste machine oils, detergents, medicines and plant protection, chemical fertilizers used in agriculture also pollute underground water sources. 4. Air pollution caused by the environment More than 50% of the world population, mostly in developing countries, to use coal, wood and straw for cooking. This is the cause of 3 million deaths annually worldwide and 4% of cases of illness. The cooking takes place in a cramped area, no exhaust system. 5. Mining industry is the biggest difficulty in the form of waste rock and mud. This waste may contain toxic chemicals that were used to separate ore from rock. Waste in mines often sulfide compounds-metal, they can form acid, in large quantities they can cause damage to crops and water sources around. Mud from the rivers and streams flowing mines can cause jams that cause runoff from flooding. 6. Furnaces and processing of alloy in the production and processing of metals such as copper, nickel, zinc, silver, cobalt, gold and cadmium, the environment affected by the waste, such as: hydrofluor, sulfur-dioxide and nitrogen-oxide fumes, as well as heavy metals such as lead, arsenic, chromium, cadmium, nickel, copper and zinc. A large-sulfuric acid is used for processing. Hazardous solid waste is also harmful to the environment. Usually people breathe toxic substances or they enter the food chain. 7. Radioactive waste and waste from uranium mining Radioactive material is used to produce electricity, used in the field of military and medicine. The disposal of radioactive waste from the reactor as a burning stick is extremely difficult. The permanently bury this waste is virtually impossible. Uranium mining process but does not create dangerous radioactive waste, but it creates a huge amount of radioactive waste is relatively low. 8. Untreated waste water in many areas, human waste and waste water untreated sewage that return water cycle. Wastewater flows untreated into rivers and lakes causing oxygen deficiency caused many types of animals and plants can not survive. According to WHO, in 2008, around 2.6 billion people without access to sanitation facilities. This is why in the city, heavily polluted water by human excreta. Each year about 1.5 million deaths related to untreated sewage. 9. Air pollution in urban areas Emissions from motorcycles, automobiles, power plants, industrial zones containing hazardous compounds and fine dust. These substances when reacted with sunlight to form new compounds, eg ozone, toxic air near the ground is very toxic. As predicted by the WHO, each year about 865,000 deaths due to cell air pollution triggers. 10. Using the battery Car battery more lead plates immersed in acid can be recharged for repeated use. The old batteries are usually transported from the rich countries to the poor countries of the third world for reuse. The removal of the battery is done very manually and does not guarantee safety conditions should occur cases of lead poisoning for workers in direct contact with the old battery. Also, in the long run, it also causes chronic poisoning: Lead builds up due to very small volumes through the respiratory system and accumulate in the bone.
đang được dịch, vui lòng đợi..