Pipistrel-USA's Taurus G4 won the NASA's CAFE Green Flight Challenge (top prize $1.35 million!) by flying 200 miles in under two hours, using an amount of electricity equivalent to less than two gallons of gas. Google sponsored the competition, which …
Sen. Lamar Alexander (R-Tenn.) tells Grist why he's crossing party lines to slash energy company subsidies and pour money into cleantech research.
Cleantech sectors saw explosive growth in 2003-2010, despite the Great Recession.
How bad is the economy? So bad that we might actually meet our greenhouse gas emissions targets, laid out in 2009 at Copenhagen, by accident.
How much will switching to renewables raise your utility bill? How about NEGATIVE ALL OF IT? In Germany, wind and solar projects have regularly been generating so much surplus energy that utilities are paying consumers to take it off the …
The Keystone XL pipeline could be a tempting target for terrorists. That's one of the points I make in a new "Room for Debate" post on the New York Times website.
Hillary Clinton's former deputy national campaign director is now lobbying Clinton and the Department of State on behalf of TransCanada, the company that wants to lay 7,000 miles of pipe between Canada's tar sands and Texas refineries.