What is climate change and how does it happen? Climate change occurs when long-term climate patterns are altered through human activity (such as, industrial pollution and automobile exhaust). “Life on Earth is possible because of the warmth of the sun.” The majority of solar radiation bounces back into space; however, a small percentage becomes trapped by the gases that create Earth’s atmosphere, also as known as the ozone layer. The ozone layer is the protective layer that surrounds Earth and blocks the majority of the sun’s ultraviolet rays (radiation which is part of the electromagnetic spectrum) due to the molecular size of the ozone molecule. It blocks rays such as UV-C (100-280 nanometers) and UV-B (280-315 nm); however, it does not block UV-A (315-400 nm). According to the Center for Global Environmental Research at the National Institute for Environmental Studies Japan, UV-A is the main cause of cancer (melanoma), while UV-B is the cause for sunburns. The ozone layer ...
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"Polynuclear Aromatic Hydrocarbons (PAHs) And/or Polycyclic Aromatic Hydrocarbons (PAHs)." Toxic Substances Hydrology Program. U.S. Geological Survey, 10 Aug. 2010. Web. May 2011.
Welch, Charles. "Ozone Hole Consequences." The Ozone Hole. The Ozone Hole Inc. Web. May 2011.
Welch, Charles. "UV Rays." The Ozone Hole. The Ozone Hole Inc. Web. May 2011.
"What Is Cancer?" About Cancer. Canadian Cancer Society, 1 Nov. 2010. Web. May 2011.
"What Is Climate Change?" David Suzuki Foundation. Web. May 2011.
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