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Published byLesley Chapman Modified over 8 years ago
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Carbon cycle and Human activity
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Carbon cycle Carbon cycles though the atmosphere, living things, soils, and the ocean.Carbon cycles though the atmosphere, living things, soils, and the ocean.
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Sources and Sinks Carbon Sinks are where carbon is stored –For example: in trees, the ocean, limestone, and underground as fossil fuels Carbon sources are processes that release carbon back into the atmosphere –For example: burning trees, volcanic activity, and burning fossil fuels
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Fossil fuels are energy-rich substances formed from the remains of dead organisms –Coal, petroleum, & natural gas are all fossil fuels.
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Atmospheric Carbon Carbon enters the atmosphere as CO 2 CO 2 is a greenhouse gas which helps keep our planet warm When CO 2 levels increase, global temperatures increase.
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Rise in Greenhouse Gases Over the past 200 years there has been a rapid increase in greenhouse gases which include: Methane, water vapor, nitrous oxide, & carbon dioxide The burning of carbon- rich fossil fuels & the removal of forests worldwide is the primary cause.
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Global Warming The increase of greenhouse gases has caused an increase in global temperatures by 1°C. It is predicted that it will increase by another 5°C in 100 years. The temperature increase is greatest at the poles.
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Impact of Global Warming Melting of the polar ice caps Rising sea levels Acceleration of warming due to release of methane from the permafrost & also less ice reflecting sunlight. Change in global weather patterns More severe storms and droughts Extinctions
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