The folks at Timberland have a competing rating system called the Green Index they launched in 2007, complete with a snazzy website and social media-friendly branding.

FORBES: Is the Eco Index a Good Way to Measure Sustainability?

Since the market hit bottom in 2009, the value of property owned by REITs has gained 60% and is back to peak levels, according to an index compiled by Green Street Advisors.

WSJ: REIT Returns Up but Trail Broader Market

In 1985 the South Dakota native cofounded Green Street Advisors, a research outfit that publishes an influential commercial property index.

FORBES: Money & Investing

Mr Green disputed her her remarks and maintained that every private flight has been checked against the warnings index.

BBC: Minister: Private flight checks not abandoned