unisphere

Credit to Author: Guest Contributor| Date: Tue, 31 Dec 2019 12:10:59 +0000

It is hard to build a net-zero building — one that produces more energy than it consumes — in the middle of a city. For one thing, nearby skyscrapers might block sunlight from reaching rooftop solar panels. For another, urban office buildings are cramped for space, and it generally isn’t possible to set up wind turbines on site