The planet hasn’t actually warmed over the last decade or so, but we have to keep the numbers going up. This requires new and creative ways to measure temperatures in the absence of thermometers.
At the same time, we can blame cold (La Nina) events like the Pakistan and Queensland floods, record snowfall, record cold, etc. on the artificial warming which we fabricated in paragraph one.
The icing on the cake is to call 2010 a La Nina year, and 2011 an El Nino year.
Got it? Now bring our Earth Day message to the world. People are better off without electricity anyway, as they proved in Japan last month.