'Human Impact on the Environment – Problems caused by population growth\r'

'In nearly 1830 the human commonwealth reached one billion, there argon now someplace round six billion people on the planet today and that figure is createing at a genuinely t each(prenominal) and very fast rate.\r\nPast populations were controlled by disease, war and famine and now beca enforce of technology and modern medicine. The environment around us has been built to support these growing poetry more thanover this development is having a huge mental picture on the worlds ecosystems.\r\nHuman populations clear other(a) distance and habitats of other species to gear up way for their own. This ignorance has eat uped many species to extinction and polluted the environment; this has endangered our selection and the survival of other species at risk.\r\nRead this Ch. 22 respiratory System\r\nHowever, in natural ecosystems factors are close whereas human ecosystems are different as we rush the technology to maximise resources and find new ones when lively ones run out. The planet obviously stick out alone hold a certain total of people, roughly species never reach their maximum numbers but they have a peak, then the numbers bugger off to decline.\r\nActivities that have changed the landscape\r\nIndustrial and domestic flagellate has to be disposed of, and as the population is change magnitude the gaga is becoming more and more demanding to get rid of. There are a attraction of things that cause defilement in change rates on a big outstrip anele spill to a normal deodorant dejection which uses cfcs. Here is a table that shows the pollutant and its personal effects on reality and the environment.\r\nPollutant\r\nEffects on humans and the environment.\r\nAir\r\nSmoke\r\nMakes breathing difficult.\r\nSulphur Dioxide\r\nCauses panelling rain.\r\nOzone\r\nDamages leaves.\r\nCFCs\r\nDamages ozone layer.\r\nCarbon Dioxide\r\nIncreases the ‘Greenhouse Effect.\r\n water supply\r\nSewage\r\nEutrophication.\r\nFertilisers\r\nEu trophication.\r\nAcid Rain\r\nMakes soils, lakes and rivers acidic.\r\nOil Spills\r\n pop fish.\r\nToxic Chemicals e.g. mercury\r\nKill fish and other aquatic life.\r\nLand\r\nSolid counteract presidency at landfill sites\r\nMethane causes explosions and increases the ‘Greenhouse Effect.\r\nMining waste e.g. go\r\nWater run-off poisons plants and animals.\r\nHeavy metals kill most plants and animals.\r\nThe taint of the Water\r\nThere are a number of different ways and processes of water pollution the primary(prenominal) ones are ‘waste government activity, ‘organic pollution and ‘eutrophication. Waste disposal is the domestic and industrial waste which is treated in sewer plants to remove impurities. The problem is that some of this waste is being disposed in many rivers and canals and polluting them heavily. This has ruined many freshwater ecosystems like the ‘Great Lakes of northeastern America and parts of the ‘Norfolk Broads. Organic p ollution is where domestic sewage is disposed in rivers and canals and the organic content in the sewage is a food source for bacteria and fungi. These organisms also take the dissolved type O in the water so that fish and other aquatic animals die out. Eutrophication is when the nitrate and phosphate levels are high this encourages the growth of algae. These algae can cause a lot of damage to the water ecosystem.\r\n* Algae grow rapidly and give an ‘algal bloom over the outdoors of the water.\r\n* Many blue-green algae produce toxins which kill some plants and animals.\r\n* Small animals that feed on algae do not multiply fast affluent to check the increase in the algae.\r\n* Algae obviate out the light for the rooted plants growing on beds of lakes and they die. This reduces the amount of oxygen.\r\n* The algal population crashed due to disputation for resources. The algae are then decomposed by bacteria which use the oxygen in the water.\r\n* This lack of oxygen kills many invertebrates and fish.\r\nAll this is the process of eutrophication.\r\nThe pollution of the strain\r\nPollution is a term used to suck up the presence of an unwanted substance. Although air contains lots of microscopic particles, like volcanic dust and tiny back grains from deserts, this pollution is natural in origin. Man-made pollution of the atmosphere however, is now causing a lot of concern. Most of this air pollution comes from the burning of coal, oil and gasconade †the fossil fuels †in power stations, factories and homes, and accelerator and diesel in cars and other road vehicles. We consider energy and electricity to keep us tender and to cook our food, but unfortunately we do not make ample from other non-polluting sources.\r\nBurning fossil fuels releases greenhouse gases into the air. This may be changing the temper and causing global warming. Other pollutants like mho dioxide and nitrogen oxides are also given off. This can reduce the quali ty of air which we breathe, leading to wellness problems, and can cause acid rain.\r\nGlobal thaw\r\nGlobal air temperatures as measured by land-based weather stations show an increase of about 0.45 degrees Celsius over the past century. These may be mistakes in info or climatic variation.\r\nSatellite data indicate a slight cooling in the climate in the last 18 years. These satellites use advanced technology and are not subject to the â€Å"heat island” effect around major cities that alters ground-based thermometers.\r\nProjections of future climate changes are uncertain. Although some computer models forestall warming in the next century, these models are very limited. The effects of cloud formations, precipitation, the role of the oceans, or the sun, are still not well known and practically inadequately represented in the climate models although all play a major role in determining our climate. Scientists who work on these models are speedily to point out that they a re far from immaculate representations of reality, and are probably not advanced enough for direct use in policy implementation. Interestingly, as the computer climate models have become more sophisticated in recent years, the predicted increase in temperature has been lowered.\r\nHowever, 98% of total global greenhouse gas emissions are natural (mostly water vapour) and only 2% are from man-made sources.\r\nSustained Development\r\nsustainable development is where a population can make developments and improvements to their area or their needs without causing malign to the environment. Sustainable development is all about a greener planet in both developed and development countries by not polluting the environment and being more energy friendly. Sustainable development is\r\n* Social increase which recognises the needs of everyone\r\n* Effective protection of the environment\r\n* heady use of natural resources\r\nSustained development can be achieved by using less fossil fuels and researching into environmentally friendly sources of energy like solar and geothermic sources. Be less wasteful so that we use fewer resources so that they are elongated and regenerate, find more effective ways of disposing of waste and producing less waste in the first place.\r\n'