Earth & Environmental Sciences
energy planning
100%
life cycle
70%
evaluation of technology
69%
bioenergy
47%
energy
38%
resource
31%
market
31%
energy resource
29%
travel
26%
vehicle
22%
environmental analysis
18%
energy industry
18%
policy
17%
carbon balance
17%
energy technology
16%
radiative forcing
15%
resource use
15%
accounting
15%
commodity
15%
shale gas
15%
teaching
15%
resource management
13%
energy balance
13%
research project
13%
alternative energy
13%
fossil fuel
13%
electricity
12%
temporal variation
12%
modeling
11%
environmental impact
11%
heating
10%
plan
9%
engineering
9%
planning
8%
pollutant
8%
need
7%
project
7%
product
6%
environmental performance
5%
material
5%
technological development
5%
distribution
5%