Earth & Environmental Sciences
coal
55%
coal gasification
12%
coal mine
9%
coal production
13%
coal seam
30%
comparison
8%
contamination
6%
cost
43%
crust
15%
environmental risk
10%
fluid
18%
freshwater environment
13%
gas
42%
groundwater
12%
hydraulic fracturing
81%
hydrocarbon
36%
in situ
6%
isotope
7%
landfill
9%
mantle
7%
material
12%
melt
7%
methane
63%
monitoring
5%
noble gas
12%
resource
5%
salinity
14%
shale gas
32%
sludge
7%
stable isotope
8%
viability
78%
wastewater
55%
water
9%
well
13%
Engineering & Materials Science
Chemical analysis
13%
Costs
31%
Fluids
20%
Hydraulic fracturing
100%
Hydrocarbons
37%
Land fill
12%
Radioactive materials
43%
Shale gas
26%
Uncertainty
6%
Waste disposal
24%
Wastewater
89%
Water
17%
Chemical Compounds
Coal
50%
Coal Gas
16%
Coal Gasification
15%
Environment
5%
Gas
55%
Groundwater
22%
Hydrocarbon
37%
Isotope
9%
Methane
66%
Noble Gas Atom
11%
Salinity
24%
Stable Isotope
11%
Thermogenic
18%
Wastewater
66%