Business Green: The US green building industry will support 7.9m and contribute over $550bn (£332bn) to the US economy over the next four years, according to a report this week from the US Green Building Council. The study found that green construction spending currently supports more than two million US jobs and generates more than $100bn in gross domestic product, but it predicted that the sector is poised for rapid growth as a result of economic stimulus funding and increased demand for …