Just have a look at fig 4 at the paper I quoted above <a href="http://www.warwickhughes.com/icecore/zjmar07.pdf" rel="nofollow">http://www.warwickhughes.com/icecore/zjmar07.pdf</a>
You will see the 'hills' I mentioned above.<p>I am not actually suggesting inaction I support any measures that will lower human impact on the planet, however, I am supporting <i>good</i> science and policies that do not have the word <i>TAX</i> in them.