Agriculture & Biology
water footprint
100%
life cycle assessment
83%
hydrogen production
74%
environmental performance
66%
environmental impact
63%
life cycle (organisms)
41%
endpoints
35%
life cycle impact assessment
29%
production technology
27%
biomass gasification
26%
water
26%
water analysis
23%
fuel cells
22%
electrolysis
22%
gasification
21%
natural gas
19%
water shortages
19%
methodology
17%
coal
17%
steam
15%
protons
15%
oxides
15%
human health
15%
hydrogen
14%
fermentation
11%
developmental stages
11%
biomass
10%
cells
5%
Earth & Environmental Sciences
water footprint
86%
life cycle
53%
hydrogen
50%
environmental performance
43%
environmental impact
40%
production system
27%
assessment method
27%
impact assessment
26%
life cycle analysis
16%
decision
16%
biomass
15%
water
15%
coal gasification
15%
fuel cell
14%
water scarcity
14%
method
14%
goods
13%
gasification
13%
water consumption
13%
footprint
12%
electrokinesis
12%
natural environment
12%
fermentation
11%
natural gas
11%
state of the art
11%
human health
10%
economy
10%
sustainability
9%
oxide
9%
membrane
8%
damage
8%
services
8%
cell
8%
indicator
7%
resource
7%
product
6%
analysis
3%
Engineering & Materials Science
Hydrogen production
72%
Life cycle
56%
Environmental impact
35%
Water
35%
Regenerative fuel cells
13%
Lignocellulosic biomass
12%
Coal gasification
11%
Steam reforming
11%
Electrolysis
10%
Reforming reactions
10%
Fermentation
10%
Proton exchange membrane fuel cells (PEMFC)
10%
Gasification
9%
Biomass
8%
Sustainable development
8%
Natural gas
8%
Hydrogen
7%
Health
6%