Delve into the second part of a comprehensive lecture on climate change, exploring crucial topics such as Earth's outgassing, photosynthesis, respiration, and the ozone hole. Examine the intricacies of the biosphere, including its sensitivity and the impact of tropical deforestation. Analyze energy demand and CO2 concentrations from 1000 to 2010, with a focus on carbon isotopes and the Suess effect. Gain valuable insights into the complex interplay of factors contributing to climate change, and understand the importance of these concepts in the broader context of Earth science.