Earth & Environmental Sciences
domestic waste
100%
economic policy
18%
economic structure
19%
economics
8%
economy
11%
environmental analysis
18%
plastic
22%
policy
8%
questionnaire survey
16%
recycling
67%
scrap metal
21%
statistical analysis
11%
sustainable consumption
21%
sustainable development
11%
trend
43%
United Nations
16%
waste recycling
16%
Social Sciences
Economic Policy
10%
economic structure
12%
economy
6%
EU
7%
Korea
78%
questionnaire
5%
recycling
97%
statistical analysis
9%
sustainable development
9%
trend
42%
UNO
8%
Engineering & Materials Science
Analytic hierarchy process
24%
Bottles
25%
Economics
20%
Plastics
15%
Recycling
84%
Scrap metal
17%
Statistical methods
9%
Sustainable development
9%