<human>:  How to start a compost bin in your backyard?
<bot>: Starting a compost bin in your backyard is easy and a great way to reduce your environmental footprint. The first step is to find a spot in your yard that has access to sunlight and is not located near any sources of water, like a drain or water pipe. Next, decide what type of bin you want to use: an open-bottom bin or a closed container. Open-bottom bins are easier to maintain, while closed bins provide more protection from critters that may be attracted to the compost. Once you have your bin, fill it with equal and alternate layers of dry "brown" materials, like leaves, and wet "green" materials, like food scraps. If you want, you can also add "activator" materials, like soil, manure, or compost starter. After you have the layers filled up, give the bin a good mix then water it lightly. Make sure to keep the bin moist but not soggy and turn the compost frequently to help it break down. With proper maintenance, your compost will be ready in 3-6 months.