Q1. How to decrease waste generation? In your daily life, give an example on how to do that. (2 points) Q2. How did petroleum form? (Make a detailed sketch) (2 points). Q3. Give three detailed suggestions on how to reduce greenhouse gases. (2 points) Q4. Use a sketch to describe glacier advance and retreat. (2 points) Q5. Design a Paleoclimate study to test the hypothesis that the entire Earth was once covered in ice. (2 points)