A December 12 Verdantix report named the top providers of sustainability assurance. The top six are:
1. Bureau Veritas (BV)
3. Det Norske Veritas (DNV)
4. Ernst & Young (EY)
6. PricewaterhouseCoopers (PwC).
What is most interesting about this list is that all of the above organizations approach sustainability from an top-down, integrated business perspective, NOT from a bottom-up environmental perspective.
You can find a summary of the Green Quadrant Sustainability Assurance Global 2013 report on the Verdantix web site.