The Waltons have given $4.5 million to anti-clean-energy groups over the last four years.
Barack Obama unveils new solar expansion plans as officials confirm White House panels are now operational.
Despite its success with renewable energy, Germany is still struggling to kick its dirtiest habit.
The latest sign of solar’s move into the mainstream is at retail stores in five states.
Fix fracking. Crack down on coal. There’s still a lot POTUS can do.