http://www.nytimes.com/2012/10/19/s...eriment-in-pacific-alarms-marine-experts.html Last fall. His intention is the stimulate the growth of phytoplankton, thus absorbing CO2. He also did so in violation of several UN charters (or whatever their rules are called) which were passed specifically to stop him from going through with this plan. There isn't much info I can find about it since then, but it appears that the experiment has been working as he had planned, six months out. http://www.scientificamerican.com/a...e-geoengineer-carbon-entrepreneur-russ-george He gave an interview recently. I don't know enough about oceanography to really dispute what he's saying, but he does appear to have thoroughly studied the subject.