Causes and Effects of Climate Change | National Geographic
National Geographic
https://www.youtube.com/watch?v=G4H1N_yXBiA

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0:00 human activities from pollution to overpopulation are driving up the earth's temperature and fundamentally changing the world around us the main
0:14 cause is a phenomenon known as the greenhouse effect gases in the atmosphere such as water vapor carbon dioxide methane nitrous oxide and
0:24 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
0:34 the atmosphere the more heat gets trapped strengthening the greenhouse effect and increasing the earth's temperature human activities like the
0:43 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
0:53 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
1:04 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
1:17 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
1:29 oceans flooding coastal regions warmer temperatures also make weather more extreme this means not only more intense major storms floods and heavy snowfall
1:40 but also longer and more frequent droughts these changes in weather pose challenges growing crops becomes more difficult the
1:51 areas where plants and animals can live shift and water supplies are diminished in addition to creating new agricultural challenges climate change can directly
2:02 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
2:13 contains ozone particles which increase rapidly at higher temperatures exposure to higher levels of smog can cause health problems such as asthma heart
2:23 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
2:36 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
2:46 effects of climate change [Music] you