Cause Of Global Warming

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“The theory of human activity (fossil fuel burning) being a direct cause of global warming is based on the assumption that atmospheric carbon dioxide concentration is directly related to global warming. Is this assumption valid?”

Global warming is brought about by the greenhouse effect. The greenhouse effect Gasses in the troposphere cause the greenhouse effect. There is a correlation between the temperature of the earth and the concentration of carbon dioxide in the troposphere, however, correlation does not infer causality.

The earth receives energy from the sun in numerous wavelengths. About 40% of this radiation is long wave-length radiation(the infra red spectrum), Carbon dioxide gas consists of small molecules whose bonds vibrate with frequencies in the infrared region of the electromagnetic spectrum. Such molecules have the ability to trap infrared radiation, thus retaining energy that would otherwise be radiated into space. Although this so called greenhouse effect caused by carbon dioxide is fundamental in maintaining the current temperature of the earth, only small concentrations of carbon dioxide are required for this purpose. Studies have clearly portrayed that atmospheric carbon dioxide concentration has increased from 320 parts per million in 1960 to a new milestone of over 400 parts per million in 2016.

A new study in the journal Nature demonstrates in real-time field measurements that confirm that carbon dioxide is trapping heat in the air for the first
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