AP Environmental Science / Unit 9: Global Change
9.4 Increases in the Greenhouse Gases
Notes
Sources:
- $\mathrm{CO_2}$: fossil fuels, deforestation.
- $\mathrm{CH_4}$: livestock, rice paddies, landfills, natural gas leaks, thawing permafrost.
- $\mathrm{N_2O}$: fertilizer, manure.
Practice
A major source of methane:
Cattle burps.
Nitrous oxide comes largely from:
Soil bacteria act on fertilizer.
The Keeling Curve shows that atmospheric $\mathrm{CO_2}$ is:
Measured at Mauna Loa.
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