Massachusetts and California lead the U.S. in energy efficiency, according to annual ranking.
LEDs could help slow global warming and illuminate the developing world. Now that's worth a Nobel Prize.
How you heat your home depends a lot on where you live, and it has implications on your carbon footprint.
A new report shows how the world could become wealthier by spending more on clean energy infrastructure.
The world's biggest greenhouse gas emitter might be getting serious about kicking its coal habit.
There's a lot scientists don't know about how bike sharing programs encourage less driving.
Find out what you missed in climate news this week in our 6 Degrees weekly roundup.
The U.S. scored 13th in global energy efficiency ranking, or near the bottom of the world's 16 largest economies.
There are pathways to reduce CO2 emissions and meet a key climate target but time is running out.
The biggest CO2 emitter won’t need to make the biggest emissions cuts under the EPA's Clean Power Plan.
The Clean Power Plan may allow some coal-fired power plants to operate without having to slash CO2.
A guidebook selling well in Germany details 200 renewable energy sites it thinks will appeal to tourists.
Energy Information Administration's online energy map shows infrastructure in path of extreme weather.
Brazil’s worst drought in decades is severely reducing hydropower energy supplies in advance of World Cup.
The IEA's fascinating graphic shows how radically CO2 emissions need to be reduced by 2050.
With a new design, the power of the Sun can now keep electricity turbines running both night and day.
Bicycle commuting can improve health and mitigate climate change, but states are in neutral.
Tech giant Apple claims that 94 percent of its corporate facilities are now powered by renewable energy.
Smart choices by cities like Miami in planning & investment could hold key to cutting emissions.
IPCC report's last installment says major shift to renewable energy needed to limit CO2 emissions.