Subject
Greenhouse gases
89
Emissions
40
Climate change
37
Global warming
26
Carbon dioxide
20
Coal
14
Environmental aspects
9
Climate
8
Environmental protection
8
Emission reduction
7
Environmental impacts
7
Government policy
7
Policy
7
Pollution
7
Environmental policy
6
Government plan
6
Greenhouse effect
6
Methane
6
Ozone
6
Power plants
6
Technology
6
Climatic changes
5
Fossil fuels
5
Synthetic fuels
5
Acid rain
4
Coal utilization
4
GOVERNMENT
4
Greenhouse gas mitigation
4
Electric utilities
3
Emmission reduction
3
Forecasting
3
International cooperation
3
Methods
3
Nitric oxide
3
Nitrogen dioxide
3
Pollution control
3
Power generation
3
Acidification
2
Air pollution
2
CARBON CYCLE
2
Carbon sinks
2
Clean coal
2
Coal industry
2
Combustion
2
Energy
2
Energy conservation
2
Energy consumption
2
Energy efficiency
2
Energy policy
2
Environment
2
more ...