Wednesday, June 15, 2011
4.13 Greenhouse Gases
understand how human activities contribute to greenhouse gases.
Burning fossil fuels -> CO2, SO2, NO2 (greenhouse gases)
they absorb infrared light and reflect them back to the planet
Cow digestion emits methane gas -> 9% of greenhouse gases
Evaporation of water -> water vapour
CFCs absorb UV light and breaks down the ozone layer
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