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Message: <blockquote data-quote="Ilya Maclean" data-source="post: 1595093" data-attributes="member: 46774">To build on the excellent points made by kristoffer current CO2 concentrations are unprecedented in the last 20 million years- see <a href="http://www.nature.com/nature/journal/v406/n6797/full/406695a0.html" target="_blank">here</a>. The rate of change is also very important - species can evolve tolerance if changes occur slowly. Current rates of CO2 increase are likely to be greater than at any time since the cretaceous. Climate change is unanimously accepted by scientists. A very small minority, far less than the media would have you believe, don't accept that it is linked to anthropogenic causesThere are at least 50 published scientific studies that I am aware of that look at the implications of carbon tax and flying. Try using Google Scholar to find a few.I don't see there's any doubt. Less CO2 in the atmosphere = less climate change, end of story. Of course, there are benefits and costs associated with the various ways of achieving this, but that's part of the ongoing debate and one we should surely welcome rather than object to if we are to combat this problem alongside others.</blockquote>