Geology Reference
In-Depth Information
Table 1
(Continued )
Compound
Natural sources
Anthropogenic sources
Other minor trace gases
Hydrogen
Oceans, soils; methane
oxidation, isoprene and
terpenes via HCHO
Motor vehicle exhaust;
oxidation of methane via
formaldehyde (HCHO)
Man-made NO
NO
2
conversion; supersonic
aircraft
Ozone
In the stratosphere; natural
NO
NO
2
conversion
Water (H
2
O)
Evaporation from oceans
Insignificant
Source: From ref. 4.
Sources of emission in the UK
10
11
9
4
3
1
2
2
7
1
7
9
2
6
3
SO
2
NO
x
NMVVOC
CH
4
7
1
9
2
4
8
3
7
1
7
10
10
7
2
CO
CO
2
N
2
O
NH
3
1. Public power, cogeneration
and district heating
2. Commercial, institutional and
residential combustion
7.
Road transport
8. Other mobile sources and
machinery
9. Waste treatment and
disposal
10. Agriculture
3.
Industrial combustion
4.
Production processes
11. Nature
5.
Extraction and distribution of
fossil fuels
6.
Solvent use
Figure 2 UK emission statistics by UNECE source category (1) Combustion in Energy
production and transformation; (2) Combustion in commercial, institutional,
residential and agriculture; (3) Combustion in industry; (4) Production proc-
esses; (5) Extraction and distribution of fossil fuels; (6) Solvent use; (7) Road
transport; (8) Other transport and mobile machinery; (9) Waste treatment and
disposal; (10) Agriculture, forestry and land use change; (11) Nature
