The fraction of electrical power that the US generates with coal has dropped from 50 % to 39 % over the last decade -LRB-- ish, according to EIA).
Not exact matches
Mandates, by contrast, specify what
fraction of produced or distributed
electrical power must derive from certain sources.
«While conventional silicon - based solar cells are more efficient than algae -
powered cells in the
fraction of the sun's energy they turn to
electrical energy, there are attractive possibilities with other types
of materials,» says Professor Christopher Howe from the Department
of Biochemistry.
The common view is that a high
fraction of renewable
power generation would be costly, and would either often leave us in the dark or would require massive
electrical storage.
If more than a small
fraction of Australia's wind
power potential is to be developed the
electrical transmission system will have to be considerably expanded (this was true in 2008, and is still true in 2016).
«The common view is that a high
fraction of renewable
power generation would be costly and would either often leave us in the dark or require massive
electrical storage,» say the researchers.