A landfill is a place where we put our garbage. Imagine if we have a big pile of things we don't want anymore, like old toys or food that we can't eat. Instead of leaving them on the ground or in our homes, we take them to a landfill.
At a landfill, the garbage is buried in the ground. This helps keep our environment clean because it prevents trash from spreading everywhere. Workers at the landfill make sure that the garbage is layered and covered so that it doesn't smell bad or attract animals.
Sometimes, things thrown away at landfills can take a long time to disappear. This is because some materials, like plastic, can last many years without breaking down. That's why it's important to recycle and reduce waste, so we don't fill up landfills too quickly!