Earth & Environmental Sciences
climate effect
77%
health impact
76%
pollutant emission
53%
air pollutant
44%
policy
43%
land
39%
trucking
36%
rail transport
35%
pollution tax
32%
climate forcing
28%
urban sprawl
28%
globalization
27%
economic growth
23%
petroleum
18%
mortality
18%
health
16%
exposure
13%
trend
11%
energy
11%
Agriculture & Biology
freight
100%
climate
56%
trucks
50%
air pollutants
36%
radiative forcing
24%
rail transportation
22%
e-commerce
21%
globalization
18%
taxes
17%
economic development
16%
urbanization
16%
at-risk population
16%
petroleum
13%
population growth
13%
carbon
9%
energy
8%
Medicine & Life Sciences
Climate
82%
Motor Vehicles
78%
Air Pollutants
62%
Health
34%
Petroleum
32%
Internationality
31%
Economic Development
31%
Insurance Benefits
24%
Carbon
23%
Maintenance
16%
Mortality
12%
Population
9%
Social Sciences
pollutant
40%
health
32%
air
28%
urban sprawl
24%
electronic business
20%
taxes
15%
mortality
15%
scenario
13%
globalization
13%
energy
12%
trend
8%
Engineering & Materials Science
Trucks
66%
Rails
60%
Taxation
27%
Crude oil
20%
Carbon
17%
Economics
15%