An interesting bit of digging by Climate Audit this week.
Back in 2008, Greenpeace published a report called "Energy Revolution - a sustainable global energy outlook".
The Greenpeace Project Manager and Lead Author was one Sven Teske. He's part of the Climate & Energy Unit at Greenpeace International.
On May 9, 2011, the IPCC announced:
Close to 80 percent of the world‘s energy supply could be met by renewables by mid-century if backed by the right enabling public policies a new report shows.
On 14 June 2011, the IPCC released the full report supporting that statement.
It turns out that our Greenpeace friend, Sven Teske is one of the authors of that IPCC report, and the scenario repeated above was based on the 2008 report he wrote when he was wearing his Greenpeace hat.
Interesting how one hand washes the other.