<human>:  How do I prune bonsai trees?
<bot>: To prune bonsai trees, you need to ensure that you remove any dead, diseased, or overgrown branches and leaves. Aim to keep the overall shape of the tree as you prune, as well as thin out the foliage to maintain its size. Be careful to only use sharp, clean cutting tools to avoid damaging the tree. If you're just getting started with bonsai, it can help to have an experienced person help guide you.