INIS
levels
100%
hydrogen
100%
barriers
100%
economy
100%
energy efficiency
100%
energy
75%
chains
50%
efficiency
50%
investment
50%
policy
37%
transport
25%
electricity
25%
coal
25%
fuels
25%
losses
12%
comparative evaluations
12%
range
12%
gases
12%
greenhouse gases
12%
cost
12%
energy consumption
12%
storage
12%
power
12%
carriers
12%
heat
12%
wind
12%
energy supplies
12%
new zealand
12%
natural gas
12%
air pollution abatement
12%
internal combustion engines
12%
renewable resources
12%
Engineering
Energy Conservation
100%
Level Energy
100%
Energy Engineering
100%
Energy Efficiency
100%
Efficiency Level
100%
Hydrogen Energy
66%
Greenhouse Gas
33%
Conventional Technology
33%
Wind Power
33%
Internal Combustion Engine
33%
Generated Electricity
33%
Derived Fuel
33%
Energy Carrier
33%
Engine Operating
33%
Straightforward Method
33%
Natural Gas
33%
Renewable Energy Resource
33%