Human: What is the most efficient way to mow a large lawn? Assistant: 
The most efficient way to mow a large lawn is to use a riding lawn mower. This will help to save time and energy compared to manual mowing with a push or self-propelled mower. Additionally, some riding mowers come with accessories like mulching kits, which can help to turn grass clippings into a nutrient-rich natural fertilizer for your lawn.