This article set off a number of red flags for me, and by the end I found it very hard to believe that this was done by a group of impartial researchers.

And sure enough, Phillip Thomas, the lead researcher for this study, comes from a 20+ year career with the chemical and nuclear industries. I would take everything in this article with a grain of salt.

http://www.bristol.ac.uk/engineering/people/philip-j-thomas/...