Earth & Environmental Sciences
anaerobiosis
14%
degradation
13%
dredging
51%
effect
2%
energy recovery
11%
experiment
3%
gas production
39%
landfill gas
13%
marine ecosystem
9%
methane
38%
method
2%
mixing ratio
10%
rate
3%
refuse
55%
sediment
4%
sewage sludge
47%
sludge
22%
Engineering & Materials Science
Aquatic ecosystems
16%
Dredging
66%
Experiments
3%
Gases
28%
Methane
46%
Recovery
6%
Sediments
12%
Sewage sludge
73%
Waste disposal
23%
Medicine & Life Sciences
Anaerobiosis
9%
Ecosystem
7%
Gases
30%
Methane
69%
Sewage
64%
Waste Disposal Facilities
23%
Weights and Measures
4%
Chemical Compounds
Ecosystem
12%
Gas
26%
Methane
39%
Mixture
4%
Municipal Refuse
100%
Time
3%
Weight
5%