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Causes and Effects of Climate Change | National Geographic
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- human activities from pollution to overpopulation are driving up the earth's temperature and fundamentally changing the world around us the main
- cause is a phenomenon known as the greenhouse effect gases in the atmosphere such as water vapor carbon dioxide methane nitrous oxide and
- chlorofluorocarbons let the sun's light in but keep some of the heat from escaping like the glass walls of a greenhouse the more greenhouse gases in
- the atmosphere the more heat gets trapped strengthening the greenhouse effect and increasing the earth's temperature human activities like the
- burning of fossil fuels have increased the amount of co2 in the atmosphere by more than a third since the Industrial Revolution the rapid increase in
- greenhouse gases in the atmosphere has warmed the planet at an alarming rate while Earth's climate has fluctuated in the past atmospheric carbon dioxide
- hasn't reached today's levels in hundreds of thousands of years climate change has consequences for our oceans our weather our food sources and our
- health ice sheets such as Greenland and Antarctica are melting the extra water that was once held in glaciers causes sea levels to rise and spills out of the
- oceans flooding coastal regions warmer temperatures also make weather more extreme this means not only more intense major storms floods and heavy snowfall
- but also longer and more frequent droughts these changes in weather pose challenges growing crops becomes more difficult the
- areas where plants and animals can live shift and water supplies are diminished in addition to creating new agricultural challenges climate change can directly
- affect people's physical health in urban areas the warmer atmosphere creates an environment that traps and increases the amount of smog this is because smog
- contains ozone particles which increase rapidly at higher temperatures exposure to higher levels of smog can cause health problems such as asthma heart
- disease and lung cancer while the rapid rate of climate change is caused by humans humans are also the ones who can combat it if we work to replace fossil
- fuels with renewable energy sources like solar and wind which don't produce greenhouse gas emissions we might still be able to prevent some of the worst
- effects of climate change [Music] you
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