It’s great to start a compost bin to help the environment – and it’s cost-efficient. The worst part about starting your compost bin is the pests it can attract. According to the California Integrated Waste Management Board, compost contains many different microorganisms, with all different makeups and things they can do. Having a lot of different microbes can lead to a chance of pesticides. Having more pesticides can lead to microbes that can break it down and deteriorate it.