Substances Emitted into the Atmosphere by Human Activity
Carbon dioxide (CO2):
- Because of its role as a greenhouse gas it has been described as “the leading pollutant” and “the worst climate pollution”.
- Carbon dioxide is a natural component of the atmosphere, essential for plant life and given off by the human respiratory system.
- CO2 currently forms about 405 parts per million (ppm) of earth's atmosphere, compared to about 280 ppm in pre-industrial times, and billions of metric tons of CO2 are emitted annually by burning of fossil fuels.
- CO2 increase in earth’s atmosphere has been accelerating
Sulfur oxides (SOx):
Sulfur Oxides (SOx) - particularly sulfur dioxide, ....
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