Exercise 1 solution

Example answer (yours will differ):
Greens: potato and carrot peelings, tea leaves, coffee grounds, apple cores, lawn clippings (small amount), cut flowers.
Browns: egg boxes, cardboard from packaging, kitchen roll tubes, scrunched newspaper, dry autumn leaves.
Keep out: cooked leftovers, chicken bones, cheese, cat litter.
Balance: the kitchen produces mostly greens, so add a bucket of cardboard or paper each time the greens go in. Aim for about equal volumes, a little more brown if the heap is wet.