Soil Contamination Agreement
The immense and sustained growth of the People`s Republic of China since the 1970s has cost the country an increased pollution price. The Ministry of Ecology and Environment sees this as a threat to the environment, food security and sustainable agriculture. As a result of scientific sampling, 150 million mu (100,000 km2) of the area under cultivation in China were polluted, with contaminated water being used to water 32.5 million Mu (21,670 km2) and 2 million Mu (1,300 square kilometers) that were covered or destroyed by solid waste. In total, the area accounts for one-tenth of China`s arable land area and is mainly located in economically prosperous areas. An estimated 12 million tonnes of cereals are contaminated with heavy metals each year, resulting in direct losses of 20 billion yuan ($2.57 billion).  In the European Union, the Urban Waste Water Treatment Directive authorizes the spraying of sewage sludge on land. The volume is expected to double in 2005 to 185,000 tonnes of dry matter. It has good agricultural properties due to the high nitrogen and phosphate content. In 1990/91, 13% of wet weight was sprayed on 0.13% of the surface; However, by 2005, this increase is expected to increase 15-fold. [must update] Proponents of [who?] say that it is necessary to control this situation so that pathogenic microorganisms do not enter streams and ensure that there is no accumulation of heavy metals in the upper soil.
 Any activity leading to other forms of soil degradation (erosion, compression, etc.) may indirectly exacerbate the effects of contamination, as soil reclamation becomes more laborious. land development through planning controls is seen as a fair and inexpensive way to manage desmenification, since those who benefit from development generally pay for remediatment. The effects occur on farmland that has certain types of soil contamination. Impurities generally alter plant metabolism and often reduce crop yields. This has a side effect on soil protection, as languid crops cannot protect the soil from erosion. Some of these chemical impurities have long periods of half-life and, in other cases, the derived chemicals are formed by the disintegration of primary soil pollution. [Citation required] SGVs will replace the old ICRCL values. CLEA SGV refers to the assessment of chronic (long-term) risks to human health and does not apply to the protection of ground workers during construction or other potential receptors such as groundwater, buildings, plants or other ecosystems. CLEA SGVS does not apply directly to a site that is entirely covered with fixed soils, as there is no direct route of exposure to contaminated soil.
[Citation required] Soil contamination or soil pollution in soil degradation is caused by the presence of chemicals (produced by humans) or by other changes in the natural soil environment. It is usually due to industrial activity, agricultural chemicals or poor waste management. The most common chemicals are oil hydrocarbons, polynuclear aromatic hydrocarbons (such as naphthalene and benzo (a)pyrene), solvents, pesticides, lead and other heavy metals. Contamination is correlated with the degree of industrialization and intensity of chemicals. The fear of soil contamination is mainly due to health risks, direct contact with contaminated soil, vapours from impurities, or secondary contamination of water inside and other soil.  Mapping contaminated soil sites and the resulting clean-up work are long and costly tasks that require considerable amounts of geology, hydrology, chemistry, computer modeling and GIS in environmental contamination, as well as an appreciation of the history of industrial chemistry.  In this process, contaminated soils are removed from the soil and treated or