Within five years, solar power will be cheap enough to compete with carbon-generated electricity, even in Britain, Scandinavia or upper Siberia. In a decade, the cost may have fallen so dramatically that solar cells could undercut oil, gas, coal and nuclear power by up to half. Technology is leaping ahead of a stale political debate about fossil fuels. More →

A Massachusetts company backed by Silicon Valley venture money said Tuesday that it has successfully conducted the first-ever demonstration of manufacturing solar cells by inkjet printing. More →