Cellulosic Ethanol Inches Forward
The technology for making fuel from wood chips and grass is late, but still on the way.
Story Archive
Topics
Can We Really Run the World on 100% Renewables?
Some studies suggest we can easily drop nuclear and fossil fuels, but they raise serious questions.
Developing Nations Put Nuclear on Fast-Forward
Fast reactors can shrink nuclear-waste stockpiles, but can designers tame the inherent hazards?
Safer Nuclear Power, at Half the Price
Transatomic is developing a new kind of molten-salt reactor designed to overcome the major barriers to nuclear power.
An App Store for Home Lighting
Philips invites developers to write apps for its Hue wireless LED light bulbs.
How to Choose an LED Light Bulb
There are now many general-purpose consumer LED bulbs that give off good light. With so many, how can you tell the difference?
Seven Next-Generation Energy Technologies Showcased by ARPA-E
Companies showed off their latest clean energy innovations at the ARPA-E Summit.
Japan's Economic Troubles Spur a Return to Nuclear
Some of the nuclear power plants shut down after the Fukushima disaster could restart soon.
Why Environmentalists Oppose One of the Best Ways to Cut Carbon Emissions
Humans may be wired to respond more to immediate issues like fracking than longer term ones like global warming.
Self-Healing Concrete Uses Sunlight to Fix Its Own Cracks
Researchers have demonstrated a way to give concrete surfaces the ability to heal when small cracks appear, an advance that could allow bridges and other structures to last longer.
