You love the outdoors. So why are you pooping all over it?

Millions of Americans a year visit national parks and many leave their business anywhere. Contrary to popular belief, that deluge of poop is not going to decompose

Last year, I watched a man squat and relieve himself 30ft (9 metres) from me, holding on to his vehicle’s front wheel with one hand to steady himself. My dog and I were on our usual walk up the dirt road that bisects our old mining town, nestled just shy of 10,000ft (3km) in south-western Colorado.

It was a short walk from the house, and we were out just to get a little movement. Not to see one.