A group of military veterans is barnstorming across America on a bus. The veterans are calling on US leaders to get the nation running on clean energy. The World's Jason Margolis took a ride on the bus.
Computer servers at big data centers around the globe generate a lot of heat. A company in Finland has figured out a way to capture that wasted energy and use it to heat homes. The World's Technology Correspondent Clark Boyd has the story from Helsinki.
From the South Sudanese capital Juba, Matthew Brunwasser reports on the role of oil in Sudan's recent history. Now the south may take the majority of wells if the referendum currently under way results in an independent South Sudan.
The nuclear accident at the Fukushima Daiichi power plant is considered the second worst nuclear disaster in history. Science journalist, Geoff Brumfiel has been writing about the Fukushima disaster for Nature magazine. He spoke with Marco Werman.
Ethanol has largely fizzled here in the US. But in Brazil, people have been driving their cars for years powered only by sugarcane ethanol. In recent years though, ethanol in Brazil has hit a speed bump.