Alternative energy

Alternative energy attracts attention as what stems global warming.
As an example of alternative energy, photovoltaics, wind power generation, the biomass, nuclear power generation, etc. are raised.
However, as for nuclear power generation, safety is improved by the nuclear power plant problem of Fukushima now.
Each alternative energy has few productions of electricity.
So, I think it is the way with easy No. 1 that we cut down an electric amount of consumption prevents global warming.