Earth & Environmental Sciences
waste management
100%
climate change
64%
research project
62%
project
58%
fossil fuel
35%
atmosphere
30%
new technology
24%
transition
20%
infrastructure
19%
cleaning up
17%
cost
16%
budget
16%
world
14%
carbon
14%
built environment
14%
social science
14%
air
14%
cleanup
14%
chemical
12%
energy
12%
engineering
12%
school
11%
economics
11%
innovation
11%
student
10%
economy
10%
mitigation
10%
petroleum
10%
combustion
9%
fossil
9%
market
9%
physical science
8%
justice
8%
policy
7%
social system
7%
externality
7%
economic system
7%
fee
7%
inflation
7%
dumping
7%
accounting
7%
research work
7%
carbon storage
6%
lifestyle
6%
developed country
6%
energy resource
6%
economic growth
6%
rate
6%
energy source
6%
point source
6%
travel
5%
catalyst
5%
developing world
5%
stakeholder
5%
carbon dioxide
5%
recycling
5%