MNN Galleries

11 clean tech innovations that can change the world

By: Bryan Nelson on April 5, 2010, 10:23 a.m.
Clean tech innovations: Sage Electrochromics

Photo: Sage Electrochromics Inc.

7 of 13

Sage Electrochromics

Sage Electrochromics is a green tech company that aims to develop smart windows based on electrochromism — glass that can change its tint when an electric charge is applied. Better yet, the degree of tint can be changed manually with the flick of a switch, much like a dimming switch can be used for home lighting. The technology can practically pay for itself by helping to regulate home heating and by saving on energy costs.