What are the two key concepts for this section? How have human activities depleted ozone in the stratosphere? List five harmful effects of such depletion. Explain how Sherwood Rowland and Mario Molina...

What are the two key concepts for this section? How have human activities depleted ozone in the stratosphere? List five harmful effects of such depletion. Explain how Sherwood Rowland and Mario Molina alerted the world to this threat. What has the world done to reduce the threat of ozone depletion in the stratosphere? How might projected climate change undermine this progress? What are this chapter’s three big ideas? Discuss the relationship between the air pollution in Los Angeles (Core Case Study) and the ways in which people have violated the three scientific principles of sustainability. Explain how we can apply these principles to the problems of air pollution.