Washington DC led North American cities on adding the most green roof footage in 2014.
The Willow School in New Jersey is one of a few in the US to earn this most rigorous certification.
NYC's entire public housing portfolio is about to get much more energy efficient.
Thanks to C40 Cities Climate Leadership, two-thirds of the biggest cities have strong codes and incentives in place.
A light bulb is no longer simply a device that allows you to see in the dark.
France requires green roofs or solar on all new commmercial buildings; and EVs also greatly reduce urban heat island effect.
Green-certified multifamily buildings will get a 10 basis point discount on loans, which advocates have pursued for years.
For the first time, LEDs completely lit the Super Bowl, cutting electricity use more than 75%.
LEED-certified federal buildings also consume 25% less energy and water and 36% less carbon emissions.
Gundersen is using every tool - waste reduction, efficiency and many renewable energy sources.