JUST about every month, a glitzy tower rises somewhere in the country, boasting the latest in “green” design and technology. To many people, that is an encouraging trend, especially when considering that commercial buildings account for more than 60 percent of the nation’s electricity consumption, according to government estimates, and generate 30 percent of all greenhouse gas emissions.
Yet these buildings represent a small fraction of the nation’s estimated 4.5 million commercial properties, many of which were erected decades ago before sustainable, or green, designs became de rigueur. This vast stock of older buildings presents a much bigger opportunity to cut down on energy consumption and carbon emissions that contribute to the warming of the planet.
Read more @ Green Buildings Don’t Have to Be New – By Amy Cortese – New York Times .