1. 19772007 Are Humans Causing Global Warming? How do we know? What is the Evidence?

2. Can we really predict climate?

3. Causes? CO2 Methane Other greenhouse gases Solar Activity El Nino / ENSO Data: Satellite temperature CO2 and temperature Melting glaciers Reduced Sea Ice Weather balloon data Ocean Temperature Extreme Weather

4. What is the evidence that suggests that human activities are causing global warming? Describe and explain how humans are causing global warming. What is the evidence that suggests that human activities are not causing global warming? Describe and explain how humans are not causing global warming. For Global WarmingAgainst Global WarmingNow What? What is the threat? What should we do? What will be the cost of change? What will be the cost of doing nothing?