Converting methane to an alternative fuel using energy from the sun could reduce carbon-dioxide emissions.
Despite the need to reduce carbon dioxide emissions, the burning of coal has only been accelerating.
An International Energy Agency report calls for more research, carbon price, to help renewables compete.
A high-power circuit breaker could finally make DC power grids practical.
Doubling the efficiency of solar devices would completely change the economics of renewable energy. Here is a design that just might make it possible.
First Solar’s strong finances are helping fund innovation and drive down the cost of solar power.
The effects of global warming will persist for hundreds of years. What are our responsibilities and duties today to help safeguard the distant future? That is the question ethicists are now asking.
A prototype system can heat and cool without draining battery power.
Interactions between hundreds of wind turbines make power output difficult to predict.
A Caltech researcher thinks arrays of tiny wind turbines could produce cheaper power than big ones.