Green building construction continues to increase, even in the current sluggish real estate market. McGraw Hill Construction, a market research resource to the construction industry, estimates that green building products and services will be a $96-140 billion market by 2013.1

Meanwhile, buildings are one of the heaviest consumers of natural resources in the United States, accounting for a significant portion of the greenhouse gas emissions that affect climate change.2 Thus, the incentives to “build green” are strong among U.S. corporations, with 82 percent of corporate America expected to be greening at least 16 percent of its real estate portfolio this year.3