PowerPoint slides Long-term environmental changes in a tropical rainforest 6910 CO2 and CH4 concentrations past, present, and future 6908 Climate-driven ecosystem succession in the Sahara: The past 6000 years (Figure 2) 6932 Climate-driven ecosystem succession in the Sahara: The past 6000 years 6907 420,000-year record of bipolar seesaw from the Iberian Margin 6906