All organic material can be divided into GREENS and BROWNS. This is an easy way to remember, however, things do not have to be green to be called GREEN. GREENS comprise... cooked and uncooked food scraps (except non-veg !), e.g., fruit and vegetable peelings, roti/ bread, rice, tea leaves, coffee grounds etc. BROWNS comprise... dry leaves, tea bags/coffee filter, waste paper including egg trays, cardboard/cereal boxes, straw, sawdust, twigs and wood chips. An easy way to remember is that greens are fresh, soft and moist materials while browns are dry and hard materials. GREENS provide nitrogen and BROWNS provide carbon and for composting to work properly, you must have both in equal quantities.