Why should bio degradable and non bio degradable waste be discarded in 2 seperate dustbins?

Biodegradable and non-biodegradable wastes should be discarded in two different dustbins so that they can be collected separately. Waste can be segregated at the source itself which in turn allows effective treatment and disposal. The biodegradable waste can be decomposed in a natural manner by the process of composting. Non-biodegradable wastes can be sent for recycling. If the two wastes are collected in a single bin, they would mix and may form toxic compounds which can cause pollution.