GM is on the hybrid bandwagon while other automakers continue to argue against it.
A study released by the National Security Space Office says that space-based solar-power systems could be built within several decades.
Photovoltaics made of nanowires could lead to cheaper solar panels.
Big batteries will fight blackouts and could make renewable power economically viable.
Determining how fast ice sheets are melting is critical to future policy.
Saving power in mobile devices.
At a remote outpost in northern Greenland, a team of scientists are attempting to resolve the central mystery of global warming: how quickly will sea levels rise?
A new way to fabricate nanomaterials could mean batteries and solar cells woven into clothing.
A graphic story chronicling NASA's various attempts to explore the red planet.
NRG Energy kicks off an expected rush of nuclear-reactor applications.