An aerial view shows part of the Hellenikon Olympic Complex built on the site of the former Athens international airport at Hellenikon for the 2004 Olympics. Greece and Qatar have reached a deal under which Qatar would invest mainly in the Greek tourism and renewable energy sectors.

GREEN AND PLEASANT LAND: Samso island now produces more renewable energy than it uses

Community-college students Fred Boncy, left, Keith Grosskopf and Alina Poulsen assemble a wind turbine in Austin, where renewable-energy firms are hiring.