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Global warming

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Introduction

Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades.image00.pngimage01.png

The greenhouse effect, is the process by which an atmosphere warms the planet. Gases such as methane and carbon dioxide that stop some thermal energy escaping from the atmosphere.

Global warming is the warming up of the planet above the temperature it "should" be. It is such a concern at the moment as it seems that the temperature is rising at a rate far faster than ever before and it is thought that it may be the activities of the human population over the last 150 years or so that is doing it.

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Middle

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Human activity

There is new and stronger evidence that most of the warming over the last 50 years is attributable to human activities. Human activities have altered the chemical composition of the atmosphere through the build up of greenhouse

gases–primarily carbon dioxide, methane, and nitrous oxide. The heat-trapping property of these gases is undisputed although

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Conclusion

By  j Winchester

Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades. The Earth's average near-surface atmospheric temperature rose 0.6 ± 0.2 °Celsius (1.1 ± 0.4 °Fahrenheit) in the 20th century [1].

The current scientific consensus is that "most of the observed warming over the last 50 years is likely to have been attributable to human activities"[2].

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