Artisan gold mining: With most simple means, such as gold ore mixed with mercury, this mixture will be melted, vaporized mercury, residual 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. Pollution of water: population growth, resources increasingly scarce water and heavily polluted. Humans can be poisoned by drinking water or eating contaminated food. Pollution of ground water: In urban areas, the choice of location of waste dump or toilets do not well up toxins 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. Air pollution due to habitat: More than 50% of the world population , mainly in developing countries, using charcoal, wood and straw for cooking. This causes 3 million deaths annually worldwide and 4% of cases of illness. The cooking takes place in a cramped area, no exhaust system. Mining industry: The biggest difficulty is in the form of waste rock and mud. This waste may contain toxic chemicals that were used to separate ore from the rock. Wastes from mines are often compounds the metal-sulfide, they can form acid, in large quantities it can cause harm to the farm and in the surrounding water. Mud from the mines into rivers and streams can cause jams that cause flow from flooding. The furnace and alloy processing: During the production and processing of metals such as copper, nickel, zinc , silver, cobalt, gold and cadmium, the environment affected by the waste as: hydrofluor, sulfur-dioxide, nitrogen-oxide fumes, as well as heavy metals such as lead, arsenic, chromium, cadmium, nickel , copper and zinc. A large amount of sulfuric acid-used for processing. Hazardous solid waste is also harmful to the environment. Usually people breathe toxic substances or they enter the food chain. Radioactive waste and tailings from uranium mining: Radioactive material is used to produce electricity, used in military field and medicine. The disposal of radioactive waste from the reactor as a gas bar extremely difficult. The permanently bury this waste is virtually impossible. The process of mining uranium but does not create dangerous radioactive waste, but it creates a huge amount of radioactive waste is relatively low. The wastewater untreated: In many areas, human excreta and waste water active untreated but returned to the water cycle. Waste water flows untreated into rivers and lakes causes oxygen deficits makes many kinds 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. Air pollution in urban areas: emissions from motorcycles, automobiles, power plants, industrial parks contain many compounds toxic 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 WHO, each year about 865,000 deaths due to air pollution cause. Using the battery: Car battery more graphite sheet soaked 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 security conditions so often been cases of lead poisoning for workers in direct contact with the old battery. Also, in the long term, it also causes chronic poisoning: Lead builds up due to very small volumes through the respiratory system and accumulate in the bone.
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