CLASS 10 SCIENCE CHAPTER-15 OUR ENVIRONMENT
1. Why are some substances biodegradable and some non-biodegradable? Solution : Substances which can be acted upon by microorganism (decomposer) are called biodegradable. For example- vegetable wastes, paper, cotton etc.On the other hand, materials which are not acted upon by decomposers are called non-biodegradable. For example- plastic, glass, polyethene etc. 2. Give any two ways in …