High blood pressure (hypertension) caused by exposure to lead, contributes to that thousands of people die each year, especially people between the ages of 35 and 50 years. In nine risk classification systems cited by the Environmental Defense Fund (Environmental Defense Fund15) lead appears as more hazardous material that most of the chemicals. He is considered to be within 10% of the materials most hazardous to human health. People might be exposed to arsenic through ingestion of food and water, especially in certain areas; they come in contact with minerals containing arsenic in groundwater. Arsenic is very toxic and causes damage to the neurological system, cardiovascular system and is linked to various types of cancer like the skin. Chronic arsenic poisoning can manifest itself by mouth sores and a leper appearance.
Inhaling arsenic increases the chances of developing lung cancer. A dose greater than 65 milligrams usually leads to a violent death. The main uses of cadmium in the environment labour are alloys with other metals, manufacture of electric accumulators, pigments and as a stabilizer in the plastics industry. Food can be a contaminant source. Cadmium is present in contaminated soils, some older pipes, some paintings (especially red, yellow and orange color) and some plastics.
Cadmium can be acquired by eating contaminated dust, by the use of plastic utensils in nutrition, inhaling tobacco smoke and by ingesting contaminated water.It is harmful in very small doses. Cadmium poisoning causes osteoporosis, Lung emphysema, lung cancer, prostate cancer, hypertension, various heart diseases and retardation in the verbal ability of children. The World Health Organization estimates that you between fifteen and eighteen million children in developing countries suffer from permanent brain damage because of poisoning by lead. Hundreds of millions of children and pregnant women are exposed to elevated levels of the lead in developing countries. Achieving sustainable development requires that there is a commitment from all in the care of the environment; to preserve, mitigate and prevent adverse health effects human exposed to exposure to hazardous substances in the environment. Industries and the authorities must commit themselves to follow the key principles of this development. For these reasons it may be noted that not only pollution affects wildlife and aquatic flora because of the pollution of lakes and rivers, but also affects severely to the subsoil, which causes infertility of the land and also causes negative effects on health in the population. Therefore you must be aware and provide special care to the environment, to thereby avoid irremediable damage.