I just read a great white paper that listed the "sin of no truth" as the #1 way companies greenwash. Just list an exaggerated claim and offer no way for consumers to find out.

At least the UK is mandating companies to report GHG's now. http://www.sustainablelifemedia.com/content/story/climate/uk_requires_companies_to_report_climate_emissions

Let's just hope a standardized reporting procedure makes its way to the US. The conversation between US and EU firms should be rewarding at Sustainable Brands Int'l next month in Miami.
http://www.sustainablebrandsinternational.com/