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Are mans activitys affecting global warming

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Introduction

Are Mans activities contributing to global warming? Global Warming The greenhouse effect that causes global warming was discovered by Joseph Fourier in 1824, and was then investigated quantitatively by Svante Arrhenius in 1896. It was first thought that global warming only caused greenhouse gases from the burning of fossil fuels. It wasn't until fifty years later that the real causes of global warming would be revealed. Not only the burning of fossil fuels, but other human activity (such as industrial halocarbons) contributed to the increase in concentration of carbon dioxide being released into the atmosphere. This is clear evidence that man does contribute to global warming. Global warming has had a lot of press coverage since the 1980's and society is now aware of it implications, as higher global temperatures were registered due to human activities and the reporting of them: deforestation, methane gas emissions, the release of nitrous oxide chemicals into the atmosphere by evolving industries; globalisation and major world economies are to blame. Other elements are released into the atmosphere too that contribute to global warming: rice cultivation, cattle (cows give off 400 litres of methane gas a year) and livestock populations, gas pipelines and landfills (where the breakdown of other substances takes place and emissions are released). Deforestation is also a big problem, as without tress and other vegetation the air cannot be purified of this lethal gas known as carbon dioxide. ...read more.

Middle

The sun produces light with a distribution similar to what would be expected from a 5525 K (5250 �C) blackbody, which is approximately the sun's surface temperature. As light travels through the atmosphere, some is absorbed by gases with specific absorption bands. Additional light is redistributed by Raleigh scattering, which is responsible for the atmosphere's blue color. 'Scientists have been aware that the Sun is responsible for virtually all energy that reaches the Earth's surface. Direct overhead sunlight at the top of the atmosphere provides 1366 W/m2; however, geometric effects and reflective surfaces limit the light, which is absorbed at the typical location to an annual average of ~235 W/m2. If this were the total heat received at the surface, then, neglecting changes in albedo, the Earth's surface would be expected to have an average temperature of -18 �C (Lashof 1989)';. Instead, the Earth's atmosphere recycles heat coming from the surface and delivers an additional 324 W/m2, which results in an average surface temperature of roughly +14 �C. The surface heat captured by the atmosphere is more than 75% can be attributed to the action of greenhouse gases that absorb thermal radiation emitted by the Earth's surface. The atmosphere in turn transfers the energy it receives both into space (38%) and back to the Earth's surface (62%), where the amount transferred in each direction depends on the thermal and density structure of the atmosphere. ...read more.

Conclusion

CONCLUSION Global warming exists and the human race does contribute to its growth. Global warming is needed for life forms to develop, but unfortunately, life forms will also die out. We are the organizers of our own demise and the victims of natures. We can try to limit what emissions we release into the atmosphere; this will only delay the inevitable by roughly two hundred years. Nature will have the last say and eventually we will either change genetically or die as a species. However, fear not, there will be other species left on the planet to lead the way, and may be they will not be so greedy and careless. It is obvious that the changes in weather patterns result from global warming: droughts, floods, diminishing food supplies, fuel shortages and leisure impacts such as delayed ski seasons are forcing people to become more environmentally conscious. The political, ethical, and socio-cultural aspects of climate change are now being noticed on a global scale and creating an eco-centric philosophy within many societies worldwide. The only way to avoid global warming is to avoid burning natural resources, decrease the human and animal population, and avoid any kind of out put of pollutants. This will never happen, as world economics will not conform to old methods of survival; it's just not to their financial advantage www.mng.org.uk http://en.wikipedia.org/wiki/Global_warming http://www.livescience.com/environment/050811_global_warming.html# http://www.livescience.com/environment/050811_global_warming.html http://www.prisonplanet.com/articles/march2007/090307warminghoax.htm http://www.yptenc.org.uk/docs/factsheets/env_facts/glob_warm.html http://www.telegraph.co.uk/ http://www.coursework.info/i/30029.html http://www.natureatwar.com/dbase/af2/rsk268.shtml ?? ?? ?? ?? Christopher Nickolas Burden 10H Chemistry Course Work 1 ...read more.

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