Thanks for a useful link.

"Not as Green as you might hope" - Slight understatement.

The greenest unit of energy is a unit saved. Failing that try to generate your own green energy where possible. However in the real world this proposition is not that easy for many of us. As the article suggests you should be wary of heavy green branding and so it is well worth the time and effort to properly check to ensure that the green energy that you are purchasing is indeed fully renewable and additional.

Greenrealist.