Environment is where we live, breath, eat, drink and survive. The pollution in the environment is the most serious problem in the modern society. The pollution occurs due to various activities of biological species. Industrial effluents and domestic sewage which contain toxic substances beyond permissible limits are directly discharged into water bodies cause water pollution. Further, emission from industrial plants, fuel combustion in motor vehicles, homes and buildings and thermal plants contains numerous chemicals that drift in the atmosphere causing air pollution. Once in the living food chain, the objectionable substances are accumulated beyond the permissible limits adversely affects the living beings. Some of the known effects on …show more content…
However, Freedman and Shukla [11] have studied the role of a toxicant on a single species and predator - prey system by considering its effect on both the growth rate of the population as well as on the carrying capacity of the environment. Further, Shukla and Dubey [31] have proposed a model to study the simultaneous effects of two toxicants, one being more toxic than the other, on a biological population. Shukla and Agrawal [30] have studied mathematical models to study the effects of toxicant on biological species by considering different situations such as allelopathy. Agrawal et al [2] have proposed and analyzed a non linear mathematical model to study the simultaneous effects of n toxicants on a biological population. But in all of these studies, it has been postulated that the toxicant affects each and every individual of the biological population uniformly. However, this may not be a valid assumption in all the cases: it may happen that the effect of a toxicant on some members of the population is more severe than the others and hence a subclass of such members may exhibit abnormal symptoms such as changes in shape, size or even deformity, etc. This is possible even if all the individuals of the population are exposed to the toxicant for the same duration as in the case of
Many parents and children had lead poisoning along with unexplained rashes and hair loss. Because
The Choco Indian rolled the dart tip on the Golden Poison Dart Frog 's back. Then he inserted the dart into the blowgun, ready for his dinner. The poison of the Poison Dart Frog has been used by the Choco Indians since ancient times. The Choco Indians would use the Golden Poison Frog 's poison by exposing the frog to heat. They then would lace their darts and arrows with this toxin.
In the 1950s and 1960s , something weird happened in the estuaries next to the long island sound , new York and Connecticut . Birds of prey , ( eagles ) fed on fish in the estuaries had soaring concentrations of the insect killer DDT in their bodies. Even though when the water in the estuaries was tested , it had low concentrations of DDT. In consequence , poisons that dissolve in fat (such as DDT) , can become more intense as they upgrade up in the a food chain in a process called biological magnification. When the pesticide mixes with the water , algae and bacteria are effected with the poison .
In Toxicity and the Consuming Subject, Enstad
The poisons such as DDT have the greatest affect on organisms at the top of food chains . for example , the white tailed eagle would have a greater concentration of DDT in its body than fish it feeds on . Top of the food chain large concentrations of DDT may kill organisms , decline its immune system , cause deformities , or damage its ability to reproduce . DDT can also weaken the shells of bird eggs. When eggs break too soon , bird embryos die .
Additionally, other environmental toxins may be present, but were not detected due to the selective and highly specific nature of the assay used. Methods that affected toxin degradation or loss, however, should render findings more conservative, meaning the frequency and level of toxins present may have been higher in animals at time of death than determined in this
( this is an analysis that is done by a Toxicologist).
Introduction Animal testing is such a controversial topic, but people barely know all the details and facts behind it. Animal testing could be argued in positive and negative ways. There are a lot of things most people don’t know about animal testing. For example, over 100 million animals are burned, crippled, poisoned, and abused in US labs every year. And that is just in the US.
Birth Defects: Birth deformities from pesticide presentation is an alternate developing sympathy toward expecting moms, grown-ups and kids. The connection in the middle of pesticides and conception deformities has been fixed to utilization of family unit spreads that execute enclosure bugs, ants, mosquitoes and insects. These intense chemicals are utilized to assault the sensory system of creepy crawlies and slaughter them, however may represent a significantly more serious danger to your unborn child's wellbeing and expand the danger for oral clefts, neural tube imperfections, heart deformities and appendage imperfections. Introduction to pesticides and insect poisons ought to be evaded no matter what amid pregnancy.
Many Americans have pets in their homes, who they consider to be important part of their lives. As a result many people are concerned with animals rights. Many people believe that animals should be treated the same as humans, however the struggle to find cures for some of America 's most common diseases, animal testing is a key to find these cures. Animal testing should be continued as long as it is done humanely, so we can find cures and new medicines.
being used in the traditional foods, but not in organics, but then those chemicals used in the traditional foods are said to be safe for human health. People are beginning to realize as the demand for food has increased with the population growth, so has the use of chemicals fertilizers antibiotics and hormones by farmers and livestock growers. The consumption of produce and meat, grown with the use of these means has led to the increase more diseases and cancers. People are beginning to believe that the only way to have a healthy
Although animals are in ample supply and typically are good models for human beings, they are not the highest fidelity model. In some cases when analyzing the side effects on an animal subject to see how it would effect a human, the results can be as accurate as flipping a coin (Archibald 1). No test can be one hundred percent accurate when regarding humans if the subjects used are an entirely different species. The best way to see what would happen to a human being is to test a human
Millions of animal bodies, many of which are contaminated with toxic or hazardous chemicals, viruses, infectious diseases, etc., are discarded after use in research and testing every year. The toxic effects of animal research can be long-lasting. Among the reasons several Superfund sites continue to be environmental hazards is animal testing. Twenty years after the experiments, the U.S. Department of Energy and the University of California Davis are still cleaning up an animal research facility that tested the effects of radiation on hundreds of beagles. Antifreeze that contains ethylene glycol has a sweet taste that attracts animals but is deadly if consumed in even small quantities; one teaspoon can kill a seven-pound cat.
• Pollution: Pollution of air, water and soil require millions of years to recoup. Industry and motor vehicles exhaust are the number one pollutants. Heavy Metals, nitrates and plastic are toxins for pollution. While water pollution is caused by oil spill, acid rain, urban runoff; air pollution is caused by various gases and toxins
Focusing on reducing air pollutants in the Earth’s atmosphere, it creates an environmentally healthy place to live in and encourage people to work together for a common cause, thus making the world a better place. In order to solve such a problem, a strong understanding is needed. Air pollution is one of the various forms of pollution. It is the presence of foreign toxic substances or pollutants into the air.