Electricity can be produced by wind, sunlight, biomass or nuclear reactors, and cars can be powered by biofuels and electricity.

ECONOMIST: Getting warmer

And also hydrogen fuel cell vehicles where the hydrogen is produced by wind and solar power and also hydroelectric geothermal power.

NPR: Study Says Ethanol Pollution Could Rival Gas

To meet its emissions reduction and renewable energy targets, the government needs to increase the amount of energy produced by wind and nuclear power, in particular, but also other forms of clean energy such as biomass.

BBC: Energy bill Q&A

The brand new visitor and education centre is powered by green energy, produced by its own wind generator.

BBC: Norfolk - From scrubland to wildlife haven

The four new sails were installed two years ago and last month the mill celebrated its first bag of flour produced by stones powered with wind.

BBC: Lincolnshire

Also making for a friendlier climate is Colorado's promotion of clean energy forms, such as a policy that requires at least 20% of its power to be produced by green sources like solar and wind energy by 2020.

FORBES: Magazine Article

That successfully produced 22kW, though it was eventually destroyed by wind and waves.

ECONOMIST: Ocean heat may be used to generate electricity

Second, through sources like wind energy, produced in part by your turbines, I want us to double the amount of electricity that we draw from clean sources.

WHITEHOUSE: Building a Clean Energy Economy