5. Read the text and answer the questions.
Waste materials, chemicals, and farm fertilizers pollute the soil, so we should use eco-friendly products. Air pollution is also a big problem. We should use alternative resources like wind and solar energy to overcome it. Deforestation destroys our natural habitats and the habitats of wild animals. We should avoid cutting down trees and plant more trees. Let's take necessary precautions and save our planet together.
a. What kind of problems are there in the text?
b. What should people do to save the planet?