Green roofs and solar chimneys are here – experts say it’s time to use them

Builders already have the tools needed to build cooler homes for an increasingly hotter worldThe US sweltered under record-breaking heat this year, with new research suggesting that air conditioning is no longer enough to keep homes cool. Spiraling energy demands and costs of indoor cooling now have planners looking to alternative ways to keep buildings cool – some fresh out of the lab, others centuries old.“The amount of buildings we expect to go up in the next couple decades is jus