How does recycling of waste materials help in ecological balance ?

Explanation

Recycling of maintaining ecological balance in the following waste materials can help in ways :
(i) By recycling the biodegradable wastes, the nutrients present in them are returned to the nutrients pool of the environment like water and soil. These are reabsorbed by plants and utilised. e.g. biogas from cow dung provide large amount of energy and the residue acts as a good manure.
(ii) Certain non-biodegradable waste like rubber and plastic pose serious disposal problems. Such substances can be recycled to manufacture usable articles. e.g. recycling of used polythene and aluminium foils.