Silicon Valley-based Soladigm raises $30 million to make auto-tinting "electrochromic glass" for green buildings.
Soladigm, which adds thin films to glass to block light and heat, plans a manufacturing plant in Mississippi to make its green building gear.
Big building companies back smart-glass startups Soladigm and Sage Electrochromics to get auto-tinting glass out of the labs and into buildings.
RavenBrick is making a self-tinting, heat-blocking glass coating that operates only from the sun's heat, rather than electricity.
Emerging technologies geared toward closing a "thermal envelope" in green building, already the largest growth market in construction, are poised to see increased growth by 2020, report says.
Building materials company pays $80 million for stake in Sage Electrochromics and plans to build a large-scale factory to make energy-saving glass.
General Electric and VC partners to invest $55 million in 12 start-ups while GE to make $10 million to students to encourage training in electric power engineering.
With political paralysis and the turmoil of Solyndra in Washington, states are taking the lead on green technology action, pitting individual states against other countries.