The study looked at how adding leachate back into landfills can help break down trash. They used small landfill models and checked the quality of the liquid that came out. They found that adding leachate back in helps break down trash better. The landfill with leachate had less waste left after 16 weeks and the liquid was cleaner. This method could be a good way to manage trash, but more research is needed to figure out the best way to do it.