What animals are affected by DDT?
In experimental animals, such as mice, rats, and dogs, DDT has shown to cause chronic effects on the nervous system, liver, kidneys, and immune system. It has also been found that humans, who were occupationally exposed to DDT, suffered chromosomal damage.
Is DDT legal?
Dichlorodiphenyltrichloroethane (DDT) is an insecticide used in agriculture. The United States banned the use of DDT in 1972, but some countries still use the chemical. It is still in use outside the United States for the control of mosquitoes that spread malaria.
What are the alternatives to using DDT?
Pyrethroids are the most cost-effective alternatives to DDT in malaria control except where pyrethroid resistance occurs (Walker 2000).
How can we stop DDT pollution?
While you cannot completely avoid these chemicals in your diet, you can make some choices that will help reduce your exposure to them. The most important actions you can take to reduce the PCBs and DDT in your diet are to cut back on animal fats and watch the type of fish you eat. Choose fish wisely.
How does DDT move through the environment?
In surface water, DDT will bind to particles in the water, settle, and be deposited in the sediment. DDT is taken up by small organisms and fish in the water. It accumulates to high levels in fish and marine mammals (such as seals and whales), reaching levels many thousands of times higher than in water.
Which type of pollution is caused by DDT?
DDT is toxic to a wide range of living organisms, including marine animals. It is a persistent organic pollutant that is readily absorbed by soils and sediments, which can act both as sinks and as long-term sources of exposure, contributing to terrestrial organisms.
How does DDT get into the environment?
DDT, DDE and DDD may also enter the air when they evaporate from contaminated water and soil. DDT, DDE, and DDD in the air will then be deposited on land or surface water. This cycle of evaporation and deposition may be repeated many times. As a result, DDT, DDE, and DDD can be carried long distances in the atmosphere.
Why are POPs dangerous?
POPs pose a particular hazard because of four characteristics: they are toxic; they are persistent, resisting normal processes that break down contaminants; they accumulate in the body fat of people, marine mammals, and other animals and are passed from mother to fetus; and they can travel great distances on wind and …