Earth & Environmental Sciences
combustion
32%
energy
31%
oxygen
27%
social structure
27%
green alga
24%
climate change impact
22%
limiting factor
21%
energy source
20%
fossil fuel
19%
byproduct
18%
greenhouse gas
18%
water vapor
17%
enzyme
17%
analysis
17%
hydrogen
16%
sulfur
16%
recommendation
16%
fold
15%
demand
13%
bacterium
13%
cost
11%
Medicine & Life Sciences
Microalgae
100%
Bibliometrics
89%
Greenhouse Gases
18%
Fossil Fuels
17%
Chlorella
17%
Chlamydomonas
16%
Chlorophyta
16%
Oxygen
15%
Climate Change
14%
Steam
14%
Sulfur
12%
Hydrogen
12%
Publications
8%
China
8%
Datasets
8%
Bacteria
7%
Technology
7%
Costs and Cost Analysis
6%
Databases
6%
Enzymes
5%
Agriculture & Biology
bibliometric analysis
97%
microalgae
61%
clean energy
33%
combustion
22%
oxygen
14%
energy
12%
Chlamydomonas
12%
fossil fuels
12%
hydrogen production
12%
greenhouse gas emissions
12%
Chlorella
11%
social structure
11%
production economics
11%
water vapor
10%
Chlorophyta
10%
byproducts
9%
hydrogen
9%
sulfur
9%
climate change
8%
China
6%
bacteria
5%
enzymes
4%
Social Sciences
energy
26%
energy source
15%
deprivation
12%
social structure
11%
proliferation
11%
climate change
10%
water
10%
demand
8%
China
7%
costs
7%
Chemical Compounds
Energy
15%
Greenhouse Gas
13%
Fossil Fuel
12%
Byproduct
10%
Dioxygen
10%
Water Vapor
10%
Green
7%
Modification
5%
Hydrogen
5%
Reaction Yield
4%