Developments In Cold Environments Sustainable Essay

To what extent are more recent developments in cold environments sustainable ? Fishing underside break up aliment chains. For practice session krill fishing in the southern ocean is depleting food supplies for whales and penguins. oerfishing of a species can severely deplete its population, sometimes beyond recovery. Overfishing of the patagonian toothfish in the Antarctic is currently a concern. Bottom trawling catches fish by dragging nets along the sea-bed. This disrupts the eco system by reducing light levels prospect increasing turbidity and catches other species as puff up as the target one. Its carried out in the catch of Alaska, the greenland sea and the barents sea. Fishing quotes perplex been introduced to limit the turn of fish caught and prevent overexploitation of the resource. Large sail ships increase pollution in the nations from the ships and from the tourist. Tourists and touristry developments disrupt wildlife and damage habitats leading to reduced bio diversity.National set have been set up to allow tourism whilst protecting the environment e.g. denali national park in Alaska was set up in 1917 and then spread out in 1980 to induce a greater area of land. Cars and private vehicles are banned from the park so visitors have to travel in park buses on approved routes. The most unsafe parts of the park dont have any roads at all. So the flat coat is protected from the damaging effects of vehicles. Oil fails can occur during transport of oil from the area. For example in 1989 there was a huge oil spill off the coast of Alaska when the exxon valdez oil tanker crashed. Over 40 million litres of oil spilled into the ocean and over 250 000 birds and fish were killed. Oil spills can occur if the pipelines safety valve between 1977 and 1994 there were on average 30 to 40 spills a year from the trans-alaska pipeline. Some of these were caused by intentional attacks and forest fires. Oil pipes have spontaneous shut off valves in order to background oil spills if the pipelines are damaged.