Greenhouse gas caused by human activity, another important one. The
substance FC (CFC or Chlorofluorocarbon) which is used as a refrigerant and used to produce foam. But not defined in the Kyoto Protocol. Because of the restricted substances in the Montreal Protocol and
other human activities are adding greenhouse gases these. (Except perhaps for steam)
- combustion of coal. Oil and natural gas
- and deforestation causing carbon dioxide
- the agricultural and livestock emissions of methane and nitrous oxide
- from automobile exhaust fumes, ozone emissions.
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