from a Deutche Welle interview with Hans von Storch:
DW:In which case you’d be running the risk of loosing your credibility?
HvS: That’s exactly the point that I don’t like: that in the end we lose our credibility. For outsiders it always looks a bit like us climate scientists jump to any explanation that doesn’t go against our basic assumption – that CO2 is behind global warming. I do believe that this basic assumption is right, but it could also be that there are other factors we’ve underestimated so far.