Earth & Environmental Sciences
biochar
50%
sewage sludge
45%
resource
26%
catalyst
12%
gas storage
8%
soil amendment
8%
nuisance
8%
resource availability
7%
biofuel
7%
industrialization
7%
pyrolysis
6%
electrode
5%
wastewater treatment
5%
urbanization
5%
material
5%
physical property
5%
combustion
5%
sludge
5%
Engineering & Materials Science
Sewage sludge
70%
Recovery
32%
Chemical modification
10%
Catalyst supports
8%
Carbonization
8%
Wastewater treatment
7%
Biofuels
7%
Pyrolysis
6%
Physical properties
6%
Catalysts
5%
Soils
5%
Electrodes
5%
Carbon
5%
Chemical Compounds
Soil Amendment
27%
Modification
26%
Biofuel
17%
Absorbent
17%
Wastewater Treatment
15%
Environmental Pollutant
13%
Pyrolysis
10%
Gas
8%
Catalyst
6%
Surface
5%
Social Sciences
sewage
65%
resources
20%
Wastewater treatment
9%
biofuel
8%
pollutant
7%
industrialization
7%
urbanization
6%
environmental impact
6%
amendment
5%