9.1 & 9.2 Stratospheric Ozone Depletion (22/23)9.3 - The Greenhouse Effect (22/23) 9.4 - Increase in Greenhouse Gases (22/23) 9.5 - Global Climate Change (pt. 1) (22/23) 9.5 - Global Climate Change (pt. 2) (22/23) 9.6 - Ocean Warming (22/23) 9.7 - Ocean Acidification (22/23) 9.8 - Invasive Species (22/23) 9.9 - Endangered Species (22/23) 9.10 - Human Threats to Biodiversity (22/23) 