Some sources do quote it as lbs rather than a tons e.g. https://www.washingtonpost.com/sf/brand-connect/subaru/tackling-trash-in-our-nations-green-spaces/ https

Some sources do quote it as lbs rather than a tons e.g. https://www.washingtonpost.com/sf/brand-connect/subaru/tackling-trash-in-our-nations-green-spaces/ https://www.washingtonpost.com/sf/brand-connect/subaru/tackl... I could believe it, if most visitors are simply walking through the visitor centers and then leaving, which I bet is the case for a lot of the high traffic parks (think Independence Hall, Lincoln Memorial, etc.) At most you’re dropping some food wrappers, which is pretty light.