Engineering & Materials Science
Bottles
100%
Polyethylene terephthalates
80%
Cooking
73%
Biogas
72%
Recycling
71%
Chemical activation
55%
Life cycle
53%
Substrates
44%
Oils
40%
Plastics
38%
Industry
27%
Environmental impact
19%
Raw materials
19%
Gas holders
18%
Agricultural wastes
14%
Anaerobic digestion
13%
Municipal solid waste
13%
Latent Class Analysis
13%
Economics
13%
Solid wastes
12%
Land fill
12%
Washing
12%
Global warming
11%
Bacteria
11%
Petrochemicals
11%
Developing countries
10%
Oxygen
8%
Polymers
7%
Degradation
7%
Water
5%
Earth & Environmental Sciences
biogas
61%
substrate
42%
oil
36%
evaluation
29%
type of waste
15%
agricultural waste
15%
social problem
14%
pig
12%
anaerobic digestion
12%
digestion
12%
food
8%
degradation
8%
oxygen
8%
bacterium
7%
economics
7%