We have no idea what's natural and what's man made. [...] There is no fingerprint of human-caused warming.
![We have no idea what's natural and what's man made. [...] There is no fingerprint of human-caused warming.](http://cdn.quoteddaily.com/images/roy-spencer/we-have-no-idea-whats-natural-and-whats-man-made--there-is-no-fingerprint-of-human-caused-warming.jpg)
We have no idea what's natural and what's man made. [...] There is no fingerprint of human-caused warming.