Rubber mountain
Human waste has been a growing problem (pun intended) for centuries, but it’s only relatively recently that we have come to see it as something that needs immediate action. When you’re emptying your garbage can at the end of the week, it probably doesn’t seem like much of an issue.
Look closely at this photo and you’ll see that it’s a ginormous pile of discarded vehicle tires. These are usually incinerated so they give off fumes as well as taking up an awful lot of space.