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2. How to Properly Test for a CO2-induced Influence on Extreme Weather
2.1. Obtain Proper Data Over a Sufficient Time Period
2.2. Natural Variability Must be Studied and Known
2.3. Non CO2-driven Impacts Must be Resolved and Removed
3. Extreme Weather Observations and Trends
3.1.1 Trends of the Past Century
3.1.2. Natural Variability Seen from Long-term, Centennial-scale Studies
3.1.3. Other Factors Driving Observed Trends
3.2.1. Trends of the Past Century
3.2.2. Natural Variability Seen from Long-term, Centennial-scale Studies
3.2.3. Other Factors Driving Observed Trends
4. Concluding Remarks