As the year 2009 is ending the World Meterological Organization reveiled in a report that this decade was the warmest ever recorded. This happens as each passing decade is warmer than the previous one.
What disqualifies any natural phenomenon as an explanation is the speed of the warming and the exceptional increase of greenhouse gases emissions for the past decade.
Climate change is already taking place and causing unrest and troubles all over the world. It is high time our representatives acknowledge the fact and act.