Global warming

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Faith cooper

Do you remember when a white Christmas was the norm?

Due to an increase in the Earth’s temperature; global warming, there have been noticeable changes in climate which also come with detrimental effects on the environment, animals and ourselves.

For example, our warmer earth leads to changes in rainfall patterns, a rise in sea levels, a wide range of impact on plants and wildlife, as well as us humans.

Although the green house effect is needed and is a good natural process that the earth needs; too much of this is bad for the Earth,

Global Warming is caused by the entrapment of heat through "greenhouse gases". Greenhouse gases are gases that keep heat that enters the atmospheres from returning therefore creating a build-up of heat. The sun can penetrate theses gases, but unfortunately cannot escape them so easily. The sun's rays initially are absorbed by atmosphere molecules, and then are detained by the gases as shown in diagram A. The gases produced by the many examples causing a blanket effect around the Earth causing the heat to be trapped by excess carbon. Without these gases, the world would be seventy-two degrees Fahrenheit cooler, too cold to support life. In the long run, if the amount of greenhouse gases in the atmosphere increases, the earth will eventually become too hot for habitation.

A lot of this is caused by human activity, which can be reduced. Human activity such as noise and sound pollution, the intense fumes that come from car exhausts, factories, also shown in diagram A and littering. The diagram explains:

The green house effect is a balance of incoming and outgoing infrared radiation. Meaning the Earth’s temperature should stay constant, but within recent times human increase has lead to a significant increase In the amount of gases in the atmosphere. The green house effect is the rise in temperature that the Earth experiences, because of the green house gases that are being released into the atmosphere. Some of them being:

  • Methane, (13%)
  • Nitrous Oxide, (15%)
  • Fluorocarbone, (5%)
  • Water vapour. 

These trap energy from the sun, creating a blanket around the Earth, which prevents heat escaping back into space. Without these gases the Earth would be much colder,(33 degrees Celsius) which would make it practically impossible for humans to survive, but if the blanket of greenhouse gases became thicker it would make the Earth much warmer than normal, potentially causing a lot of serious problems not just for humans but nature and animals too.

Burning coal and oil, which is needed everyday to power items, also produces these greenhouse gases.

Different power stations and deforestation release carbon dioxide into the atmosphere, and Rice fields and dumps release methane. Nitrous oxide, released by cars, which also helps to put these gases into our Earth’s atmosphere.  So in theory man could be to blame for global warming.

There is evidence that the greenhouse effect is happening in the UK as recorded temperatures show an on-going increase. Which means by 2020, temperatures for London and the rest of the UK could rise to 30-32 degrees Celsius, as the blanket of gasses around the Earth has become much thicker, and the co2 levels have escalated. Meaning more heat has been trapped close to the Earth’s surface, trapping the infrared radiation.

Below is a graph showing the co2 emissions increasing.

This chart (Diagram B) shows how the co2 emissions have steadily increased in forty-six years. With figures increasing from 312ppm too 381ppm. An alarming increase of almost 70 ppm.

Dr. Mike Hulme says.

“ The amount of carbon dioxide in the atmosphere has risen by approximately 30-40%” Also being evidence towards global warming. Not only the carbon dioxide levels have increased but also the other gases that contribute to the greenhouse effect, in the atmosphere have risen and are continuing to rise as human activity continues.

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The burning of coal, oil, and natural gas, as well as deforestation and various agricultural and industrial practices, are altering the composition of the atmosphere and contributing to climate change. These human activities have led to increased atmospheric concentrations of a number of greenhouse gases, including carbon dioxide, methane, nitrous oxide, chlorofluorocarbons, and ozone in the lower part of the atmosphere. The importance of these gases is shown in Diagram C.           Importance of the various greenhouse gases               and small particles currently in the atmosphere. Bars extending above the ...

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