A recent report suggests that we are more than half way towards the 2 degrees Celsius elevation in global temperatures where climate changes becomes truly dangerous (http://www.bbc.co.uk/news/science-environment-34763036). The first thing to note about this is that the 2 degree 'maximum' is entirely arbitrary and there is no real binding evidence that lesser increases will not produce catastrophic (and irreversible?) changes. It is remarkable, given the accumulated evidence that people still argue that humans can carry on doing what they are doing to increase levels of greenhouse gases. Apparently (in spite of declining prices), Middle East oil extraction has hardly changed.
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