Subject
raw material supply
19
raw material policy
18
mining
15
energy planning
12
energy statistics
11
petrochemistry
11
raw material consumption
11
environmental protection
10
oil
10
petrochemical industry
10
petroleum
10
petroleum exploration
10
electricity
9
gas
9
petroleum geology
9
raw material shortage
9
petroleum deposit
8
raw material
8
petroleum geochemistry
7
mineral resources
5
petroleum formation
5
petroleum reserve
5
fossil fuel
4
heavy oil
4
hydrocarbon
4
lignite deposit
4
lignite mining
4
natural gas deposit
4
natural gas production
4
petroleum demand
4
petroleum industry
4
petroleum origin
4
petroleum production
4
petroleum supply
4
renewable energy source
4
aluminum
3
aluminum industry
3
economy
3
energy environment balance
3
energy prognosis
3
environmental impact
3
environmental policy
3
metal industry
3
mineral deposit
3
mining engineering
3
natural gas supply
3
oil deposit
3
renewable resource
3
resource assessment
3
rubber
3
more ...