The World's Environment editor Peter Thomson speaks with anchor Lisa Mullins about the significance of the Japanese government's expansion of the evacuation zone around the Fukushima Daiichi nuclear plant.
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.