The evidence: is this normal? -- So what's up with the weather? -- Evidence of climate change -- Follow the energy: atmosphere, oceans, and climate -- Energy and earth?s climate -- The weather machine -- Deep time: a long history of natural climate change -- Revealing ancient climate -- Climate history -- Impacts of climate change: from polar bears to politics -- The global impacts of climate change -- People and politics -- Global solutions: managing the crisis -- The energy crisis -- Turning knowledge into action