Environmental Engineering Reference
In-Depth Information
Table
Percentage of total primary energy supply (TPES)
and world CO
emissions by fuel
.
Energy
source
Percentage of
TPES
Percentage of world CO
emissions
Oil
Coal
Natural gas
Nuclear
power
Hydroelectric
Combustibles
Other
the roads to decarbonization of the various sectors of the
economy also differ. For example, in most of the world,
oil dominates the transportation sector, coal dominates
electricity generation, and gas is the largest source of heat
for buildings.
Table
above gives the breakdown of the compon-
ents of the primary energy supply worldwide according to
the International Energy Agency
.
'
s most recent analysis
[
and the projection
under business as usual is that the breakdown by fuel will
be about the same in the year
]. The data are from the year
, though the total usage
will be up by about
%. This is consistent with the older
International Institute of Applied Systems Analysis
(IIASA) projection that I used earlier.
Of the three fossil fuels, on an equal-energy-content
basis coal is the largest greenhouse gas emitter, oil is next
and natural gas is last. Even though oil represents a larger
piece of the TPES, oil and coal are each responsible for
about the same greenhouse gas emissions.
