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Clean Energy

A Technology Review Special Report focusing on innovations in alternative energy sources and the technologies driving them.

Tilting at Water Turbines

A collection of weird and wonderful devices designed to harvest energy from the ocean.

China's Solar Industry

Behind the scenes at Suntech Power, the world’s largest solar manufacturer.

Why Boston Power Went to China

Christina Lampe-Onnerud, founder of the battery startup, discusses the advantages of moving the company's manufacturing and research to China.

In Search of the Ideal Grid Battery

Researchers at Stanford make an electrode that can be recharged 40,000 times without losing much capacity.

Advance Could Challenge China's Solar Dominance

New technology could tip the balance back in favor of some solar-panel manufacturers outside China.

Gasoline Fuel Cell Would Boost Electric Car Range

The advanced fuel cell could eliminate range anxiety and make electric cars more practical, while keeping carbon-dioxide emissions low.

The Trouble with India's People Car

Tata created the world's least expensive automobile. The only problem now is selling it.

Green Transportation

How Vehicle Automation Will Cut Fuel Consumption

Cars that park themselves and automatically convoy with other cars could reduce congestion and emissions.

GM Ditches the Gas Tank in Its New Electric Car

It seems few consumers want range-extending gas engines in their electric vehicles.

A New Generation of Green Wheels

A gallery of electric and hybrid vehicles on display at the International Motor Show in Frankfurt, Germany.

The Future of Hydrogen Cars

Proton OnSite's lack of progress toward its proposed "hydrogen highway" demonstrates the low priority America gives this alternative fuel.

What New Emissions Standards Will Mean to Automakers

Increasing mileage standards to 54.5 mpg won't require major new technologies, say experts.

Alternative Fuels

EU Is Overrating Biofuels Benefits

New report suggests an error in estimates of greenhouse gas emissions.

Making Bacteria Make More Fuel

Engineered E. coli convert sugar to butanol 10 times faster than other microbes.

New Process Could Make Canadian Oil Cheaper, Cleaner

A method for getting oil out of tarry sands could reduce the costs and lower the greenhouse-gas emissions associated with its extraction.

Cleaner Coal Faces an Uncertain Future

The end of an ambitious carbon-capture project shows that it's hard to economically justify the technology in the absence of a carbon policy.

Clean Storage

A Simple Way to Boost Battery Storage

A stretchy binder material that's compatible with existing factories could help electric cars and portable electronics go 30 percent longer.

New Battery Could Be Just What the Grid Ordered

A Pittsburgh company says its battery has the long life and cheap cost needed to be practical for energy storage.

Energy Storage for Solar Power

Startup BrightSource announces a new system that could allow future solar plants to run at night.

China Beckons for Green-Energy Startups

Boston Power's move reflects China's willingness to provide incentives for companies in strategic industries.