The document discusses three environmental issues: the greenhouse effect, the hole in the ozone layer, and acid rain. It provides a step-by-step guide including brainstorming, defining key terms in a glossary, explaining the issues, including maps, exercises, and questions and answers. Specifically for the greenhouse effect, it defines terms like greenhouse, greenhouse gases, photosynthesis, infrared and ultraviolet radiation, global warming, fossil fuels, power stations, and deforestation. It also provides two websites with diagrams and animations about the greenhouse effect.