humans cause

Antihistamines - Histamine is naturally present in almost all body tissues. When the human body meets substances causing allergies, histamine is released. For e.g., when a person is suffering from hay fever, histamine is released. Amines that are used as drugs to control the all..

Generating energy to meet the demands of human being is one of the greatest interferences of human beings on the nature. Any form of generating energy leads to imbalance in natural eco-systems. Some of such imbalances will cause pollution. Out of important method..

Iodine deficiency leads to this disease. Iodine is essential for the body in very small quantities for the preparation of thyroid hormone thyroxine. Goit..

Both pollutant and contaminant are similar aspects of environment pollution. They both cause harm to the environment by being introduced in undesirable amounts. Pollutants refer to an excess of substances already present in nature. Oxides of nitrogen from vehicle exhaust in cities is an ..

Tobacco is consumed as smoke (cigarette, bidi, cigar) chewing substances (gutkha) inhaling powder (snuff). Tobacco contains an alkaloid - nicotine. It is responsible for intoxication - by stimulating the conduction of nerve impulses and by increased secretion of adrenalin. However, nicotine alone i..

Where many pesticides are extensively used to kill insects like mosquitoes. Apart from killing mosquitoes, these chemicals cause large pollution to drinking water, soil as well as many food stuff. For e.g., Spraying DDT, BHC to control mosquito based human diseases is extensivel..

Presence of dangerous unnatural ingredeints causing imbalance in the ecosystems and health hazards to human beings and animals is called pollution. Pollution is mainly found in air, water, soil, food and sound. Major human activities like industries, agricultur..

Genetic engineering can be described as an in vitro manipulation of genes. It refers to artificial synthesis, modification, removal, addition and repair of the genetic material (DNA) to alter the genotype at will. It has evoked great interest because it may enable the geneticists in the near ..

Gene Manipulation (Genetic Engineering) - Genetic engineering can be described as an in vitro manipulation of genes. It refers to artificial synthesis, modification, removal, addition and repair of the genetic material (DNA) to alter the genotype at will. It has evoked great interest because it may..

Mechanical waves which can cause the sensation of hearing are called sound waves. These waves are produced by bodies vibrating at frequencies lying between the range of 20Hz and 20,000Hz, perceived by the human ea..