Like I said, it wasn't supposed to be directly convertible. The point of these sentences was that the UK and the US produce gigantic amounts of waste. That's it

Like I said, it wasn't supposed to be directly convertible. The point of these sentences was that the UK and the US produce gigantic amounts of waste. That's it. Who of the two is worse is besides the point, and absolute numbers would only tell part of the story anyway. Since the US is much bigger, we already know it produces more waste. Edited to add: The sentences also talk about different kinds of waste. Apples to oranges really. There's no point in converting.