the "Carbon Dioxide" puzzle piece
for more information about Human Influences on this gas.
Climate Change: Human Influences-- Atmospheric CFCs
concentrations of chlorofluorocarbons (CFCs), anthropogenic
aerosol compounds containing chlorine, fluorine, and carbon, have
increased dramatically in recent decades. These compounds, also known
as freons, were commonly used in propellants, refrigerants, and solvents.
In 1989, after discovering the environmental impacts of CFCs, the leaders
of 13 nations agreed to stop producing them by the year 2000. It will
take some time, however, for the CFCs already in the atmosphere to be
broken down. Figure:
The concentration of chlorofluorocarbons in the atmosphere from 1977 to
/ Atmospheric Methane / Atmospheric
Nitrous Oxide / Tropospheric Ozone
/ The Chemistry
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