Business & Economics
Urban Transportation
100%
Cost-effectiveness
96%
Rail
71%
Greenhouse Gas Emissions
70%
Cap and Trade
24%
Life Cycle Analysis
13%
User Cost
13%
Public Subsidies
12%
Savings
11%
Automobile
10%
Cost Accounting
10%
Emission Reduction
10%
Cost-benefit
10%
Aircraft
10%
Cost of Capital
9%
Finance
9%
Travellers
9%
Alternatives
9%
Policymaker
7%
Decision-making Process
7%
Decision Maker
6%
Methodology
4%
Costs
3%
Engineering & Materials Science
Urban transportation
90%
Cost effectiveness
72%
Gas emissions
69%
Greenhouse gases
69%
Rails
58%
Costs
18%
Cost accounting
15%
Finance
11%
Automobiles
9%
Life cycle
8%
Decision making
7%
Aircraft
7%
Earth & Environmental Sciences
greenhouse gas emissions
60%
speed
44%
project
35%
cost
35%
accounting
21%
public
13%
life cycle analysis
12%
cost-benefit
11%
finance
11%
subsidy
10%
savings
9%
emission reduction
9%
automobile
8%
aircraft
8%
price
8%
decision making
7%
decision
6%
policy
5%
methodology
5%
analysis
5%
program
5%
trend
4%
Social Sciences
costs
38%
cost accounting
15%
savings
9%
life cycle
9%
motor vehicle
9%
subsidy
9%
dollar
9%
aircraft
9%
decision-making process
8%
decision maker
8%
finance
8%
methodology
5%
trend
4%