Unit 8 · Environmental Biology
Types of waste, the waste hierarchy (reduce, reuse, recycle), composting, biogas, landfills and sewage treatment, and the principles and goals of sustainable development.
Deshapriya Senevirathne. B.Sc. (Hons) Biology Special, University of Peradeniya — graduated with a class pass. All the content and lessons in A/L Biology on Paadama are reviewed by Deshapriya Senevirathne, and the lessons are taught by him.