Earth & Environmental Sciences
cost
13%
diesel
12%
diesel engine
29%
effect
3%
engine
12%
environmental protection agency
25%
environmental regulation
75%
environmental sustainability
14%
exhaust gas
15%
gas engine
20%
industry
39%
particulate matter
11%
profitability
29%
regulation
9%
sulfur
9%
targeting
12%
trucking
100%
Business & Economics
Costs
10%
Diesel Engine
37%
Environmental Protection Agency
34%
Environmental Regulation
66%
Environmental Sustainability
13%
Exhaust Gas Recirculation
27%
Financial Performance
10%
Industry
23%
Operating Ratios
21%
Oversight
13%
Particulate Matter
19%
Profitability
33%
Targeting
11%
Trucking
85%
Engineering & Materials Science
Costs
9%
Diesel engines
22%
Engines
16%
Environmental Protection Agency
35%
Environmental regulations
85%
Exhaust gas recirculation
16%
Industry
28%
Profitability
23%
Selective catalytic reduction
17%
Sulfur
12%
Sustainable development
11%
Social Sciences
costs
14%
efficiency
9%
Environmental protection agencies
28%
Environmental regulations
78%
evidence
27%
financial performance
18%
industry
38%
profitability
30%
regulation
7%
sustainability
9%