What problems can be caused by the overuse of plastics?

The overuse of plastics leads to many problems like environmental pollution, health hazards, etc. Plastics are not biodegradable and take thousands of years to degenerate. This results in environmental pollution. When plastics are burnt, they release hydrogen chloride gas. This hydrogen chloride gas gets combined with the moisture in the environment to form hydrochloric acid, which is toxic and can cause problems to the human body. Recycling of plastics is very costly. Even though biodegradable plastics have been developed by scientists, they are costly and are not used on a large scale.