Cities often convert city-owned buildings first, then try for the whole town.
For decades, families had little choice but to use kerosene. Now they’re swapping solar electricity.
Storing the sun is a tall order, but probably the only one that can help us move forward with solar energy.
The tricky balance of diesel and renewable energy in the far north.
The upper atmospheres of gas giants are unaccountably hot. Jupiter’s Great Red Spot may be the key to understanding why.
Next week's total solar eclipse will give NASA a rare peak at the Sun's atmosphere.
That's “a remarkable shift in a very limited period of time.”
As an important tax credit fades, it's imperative that companies like SolarCity make big moves to help solar survive.
Divestment is working. Starting in 2016, the coal industry is set to lose billions of dollars.
Taxing the rich to give the poor clean power.