Article Critique Assignment Example | Topics and Well Written Essays - 750 words

obligate Critique - Assignment ExampleThe use of dichlorodiphenyltrichloroethane, however, is heavily regulated under the World Health organisations Position Statement on dichlorodiphenyltrichloroethane and the agreement named Stockholm Convention of Persistent natural Pollutants. These documents allow the use of DDT only for Indoor Residual Spraying and that too until equally efficient and affordable alternatives are developed. DDT has 6 to 12 months effectiveness when sprayed on walls and ceilings of homes. This is the longest residual lifespan of any insecticide. Apart from that, DDT casts irritant effect on dis simplicity vectors creating strong spatial repellency and lessen gentle - vector contact signifi give the axetly. This results in mosquitos feeding off at far off places external the houses, thereby tremendously hampering the transmission of the disease in gentleman population (WHO). Moreover, the cheapness of the chemical and ease of its use have made it a hit ov er the years. But, in opposition to all the supra mentioned benefits of DDT, there have been bundles and bundles of studies carried out by critics, highlighting its human health and environmental harms. A human can get exposure to DDT through a number of ways from eating foods that were sprayed by it, in-taking contaminated air or water, breast feeding by an exposed mother, or simply by breathing or swallowing soil particles from areas that were DDT sprayed. In response to its exposure, among the many harms that have been discovered, the most much reported ones are breast cancer, diabetes, brain damage, genital birth defects and reduced fertility. All these effects can be attributed to the high chemical stability of DDT in the four phases of disposition of its toxicity i.e., absorption, distribution, metabolic process and excretion. The chemical has the quality of accumulating in the environment through cells of exposed organisms and organic food chains, which is primarily the cur tilage why its toxicity lingers on and shows after effects in sprayed areas till long after. From the look of things, the drawbacks of DDT seem to considerably outweigh its benefits, but it is interesting to find out after pro strand research, that approximately all the studies that report potential harms from the use of DDT are either weak or mutually exclusive to each other. This can be proven both through scientific research and the numerical selective information from plagued areas. A recent paper compiled under co-authorship of a senior officer of Ugandas Malaria control architectural plan found only average concentrations of plasma DDT/DDE (77ppb) in the spray team after a continuous six months of IRS with the chemical (Bismenya et al.). Similarly, new information on increased take aims of accumulation in human milk and exposures to DDT was evaluated in 2010 by WHO expert consultation. The reported levels were concluded to be below level of concern of human health (WHO). A lot of the times, studies have been conducted on laboratory animals and the effects found on them have been generalized on human beings without proper confirmation. WHO then analyzed epidemiological selective information and found no support for these findings in humans in 2007. Adding further to the support of use of DDT are the actual cases and data from the strongly affected countries. In Sri Lanka, use of DDT had reduced malaria cases from 2.8 gazillion in 1948 to 17 in 1963. After spraying was banned in the next decade, malaria