These kind of waste products are broken down by the action of micro-organisms like Bacteria. This kind of waste decay and Decompose naturally and become harmless after some time. Biodegradable Waste Examples are Cattle Dung, Tea leaves, Wood, Grass, Fruit & Vegetables, Paper, Animal Bones. These turn into compost after decaying and act as Natural Fertilizers. They do not normally Pollute the Environment, but if present in a large quantity, those that cannot be Decomposed can pollute the Environment.