Leaf Composting is by far the most popular form of composting with a carbon source. In the fall, leaves are plentiful. You can keep your own leaves for composting and take bags from in front of your neighbors house (leaf thief!). If you are going to “Leaf Thief”, look for clear bags so that you can see that it is all leaves. You don’t want a bag that is half full of sticks. Also, avoid magnolia and other leaves that are very large and waxy. They do not break down very quickly. Look for small thin leaves. Pin oak leaves make great carbon sources for composting. Another “Leaf Thief” tip is to look for lawns that have different kids of weeds growing in them. This means that the homeowner is not using high-powered chemicals that could harm the compost you make.