Global Warming
Global warming is the gradual increase of the earth’s atmosphere resulting in an ever increasing temperature of the earth and the melting of polar land. Human population has a huge effect on global warming but human power can also determine quite dramatically how bad global warming will develop. This can affect the lives of many organisms and affect their habitat – consequently extinction occurs.
How does global warming happen and what causes it?
Global warming is the process of when solar radiation from the sun makes its way towards earth and heats it up. Half of the radiation is absorbed by the earth and the other half roughly is reflected back into the atmosphere away from the earth. However, infrared radiation is emitted from the earth; an amount of this is emitted into the atmosphere and never seen again. The other amount of radiation emitted gets trapped within the ozone layer surrounding the earth. The more radiation emitted, the thicker the ozone layer is believed to become, making it harder for the radiation to escape.