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