Plastic is an environment Hazard. Polythene bags are polluting, land, water, and air because they are non- biodegradable. A plastic bag if buried in soil will remain there intact even after hundreds of years. Plastic is impermeable to water and air. Thus it deteriorates the fertility of the land. Plastic is lighter than water and floats on the its surface. It stops mixing of vital Oxygen from air to water. It is lethal for aquatic life. It is very difficult to get rid of it. Even burning causes air pollution as many poisonous gases are produced in the process. Thinner than 5 micron plastic bags are especially harmful because if they are mixed in the soil, they cannot be picked.