Millions of Americans are evangelical Christians. Climate scientist Katharine Hayhoe is persuading them that our planet is in peril.
This is just the latest in a string of oil-by-rail accidents—and yet the feds are dragging their heels on safety rules.
On the controversial pipeline’s emissions, the paper of record got it wrong.
Despite its success with renewable energy, Germany is still struggling to kick its dirtiest habit.
A German engineer wants to turn an old mine, half a mile underground, into a giant battery.