Date post: 2017-10-09 17:51
Nevertheless, the level of pollution is steadily increasing. Many conferences dedicated to this issue are constantly held, but yet there is no result.
It is not accepted in the world to solve the environmental problem at the state level. According to the results of Carbon Disclosure Project researches only commercial structures solve the problem of emissions into the atmosphere. In the language of numbers, 85% of companies see significant risk to business in climate change. 95% of commercial organizations realize the seriousness of situation and work on its solution.
Thermal pollution affects aquatic ecosystems in a variety of ways. In general, the species composition changes as species tolerant of warmer waters replace those unable to adapt. This transition is often accompanied by an overall decrease in species richness. For example, attached algae in heated effluents were reported to show an increase in biomass but a decrease in the number of species represented.
h. Pollution due to oil: Crude oil is transported by sea after a tanker has unloaded its cargo of oil it has to take on sea water ballast for return journey. This ballast water is stored in cargo compartments that previously contained oil.
It is necessary to use non-waste technologies, to replace hazardous materials with harmless, to utilize hazardous waste and so on. To reduce air pollution it is also necessary to use the latest design of filters, choose the most appropriate technology of pollutants capture, as well as to reduce emission of the vehicle engines, improve environmental legislation and the system of ecological standards and requirements, increase punishment for environmental crimes.
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During unloading of cargo certain amount of oil remains clinging to the walls of container and this may amount to 855t in a 755,555t tankers. The ballast water thus contaminated with oil. When fresh crag of oil is to be loaded these compartments are clean with water which discharges the dirty ballast along with oil into sea.
They are one of the major sources of air pollution. The important pollutants are Carbon monoxide, Benzpyrene, Lead, Nitrogen oxides, Sulphur compounds and Ammonia.
Water covers two-thirds of the Earth 8767 s surface, with over 97% present in the oceans and less than 6% in freshwater streams and lakes. Water is also present in the atmosphere in solid form in the polar icecaps and as groundwater in aquifers (water-bearing rocks) deep underground.
b. Pesticides and fertilizers from agriculture which are washed off by rain enter water courses and finally to sea. India is estimated to use 55,555 tons of pesticides annually and about 75 percent of it is carried to-ocean.
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