Nicky led a comprehensive lesson on the carbon dioxide cycle and greenhouse effect, covering the biological impacts of air pollutants and the importance of both the carbon and water cycles to living organisms. The lesson explored how human activities have disrupted natural cycles through increased emissions of greenhouse gases and pollutants, leading to environmental challenges that students were tasked to analyze through mind mapping and discussion. Nicky concluded by examining historical data on carbon dioxide levels and their relationship to global temperatures, while emphasizing the importance of being able to explain and analyze environmental data in exam settings.