In 2010 I was asked to review a special IPCC report on renewable energy. I noted many errors and in the end someone from Greenpeace edited a main part of the summary of the report. A Greenpeace scenario, claiming that in 2050 we can produce 80 percent of our energy with renewables was presented as one of the major conclusions. The approach was not very scientific and I started wondering how other IPCC reports were being made.I found out that one third of the core writing team of the Summary for Policymakers in 2007 had connections with Greenpeace and WWF. Now I don’t claim this proves the report is false, but suppose that people found out that IPCC summary reports were written by people with connections to Exxon or Shell, would that be acceptable?