What are three ways to improve conventional sewage treatment? Describe two ways to treat sewage based on learning from nature. What is a waterless composting toilet system? Describe John Todd’s use of...

What are three ways to improve conventional sewage treatment? Describe two ways to treat sewage based on learning from nature. What is a waterless composting toilet system? Describe John Todd’s use of living machines to treat sewage. Explain how we can use wetlands to treat sewage.