Consider the food chain : Grass → Deer → Lion What will happen if all the lions are removed from the above food chain?

If all the lions are removed from the above food chain, the population of deer will increase greatly, as there will be no lion to consume them as food. Then the density of grass will decrease due to overconsumption by a large number of deer.

Non- Biodegradable waste: The waste material that cannot be broken down into non-poisonous substances also that cannot be decomposed and recycled is called non-bio degradable waste. Example: Plastic, polythene bags etc.