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global atmosphere
Net Greenhouse Gas EmissionsR 5: 1990-2003
Net emissions taking account of emissions and removals
(Million tonnes of carbon equivalent)
'Basket' of GHGs | 1990 | 1995 | 2000 | 2001 | 2002 | 2003 7 |
|---|
Carbon dioxide (CO 2) | 13.7 | 13.1 | 12.9 | 13.0 | 12.1 | 12.1 |
|---|
Methane (CH 4) | 1.8 | 1.7 | 1.5 | 1.4 | 1.3 | 1.2 |
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Nitrous oxide (N 2O) | 1.7 | 1.5 | 1.4 | 1.4 | 1.4 | 1.4 |
|---|
Hydrofluorocarbons ( HFCs) | 0.00 | 0.04 | 0.15 | 0.2 | 0.2 | 0.2 |
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Perfluorocarbons ( PFCs) | 0.03 | 0.02 | 0.03 | 0.02 | 0.02 | 0.02 |
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Sulphur hexafluoride (SF 6) | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 |
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Net Scottish emissions8,9,10 | 17.3 | 16.4 | 16.0 | 16.0 | 15.0 | 14.9 |
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Total UK Emissions11 | 204.7 | 188.6 | 177.5 | 180.7 | 175.2 | 177.2 |
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It should be noted that improved data sources and estimation techniques have routinely led to revision of historic greenhouse gas emission estimates.
'Greenhouse' gases ( GHGs) in the atmosphere help to retain radiation, resulting in warming of the lower atmosphere and earth surface. The process, known as the greenhouse effect, is essential to maintain global temperatures that sustain life on earth. Atmospheric concentrations of GHGs have increased as a result of human activities since the industrial revolution ( c.1750). This has enhanced the greenhouse effect.
The net emissions of a basket of six greenhouse gases in Scotland (taking account of removals of carbon dioxide due to land use change and forestry) fell by 14% between 1990 and 2003. Net emissions of carbon dioxide fell by 8% over this period.
SOURCE: NETCEN 12
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