Mathematics
Biomass
100%
Sector
75%
Substitution
68%
Natural Gas
59%
Petroleum
50%
Electricity
50%
Carbon Dioxide
28%
Empirical Analysis
25%
Substitute
21%
Demand
18%
Evidence
15%
Complement
14%
Output
13%
Energy
12%
Dependent
12%
Model
5%
Earth & Environmental Sciences
substitution
64%
biomass
44%
electricity
32%
natural gas
31%
price
29%
petroleum
28%
coal
24%
empirical analysis
21%
allocation
15%
carbon dioxide
14%
demand
11%
energy
8%
Engineering & Materials Science
Substitution reactions
72%
Biomass
66%
Crude oil
31%
Natural gas
31%
Electricity
26%
Coal gas
24%
Carbon dioxide
16%
Coal
14%
Chemical Compounds
Substitution Reaction
45%
Fuel
44%
Natural Gas
41%
Electricity
40%
Petroleum
33%
Coal Gas
28%
Coal
17%
Carbon Dioxide
14%
Energy
8%