People can be so messy - but litterbugs beware, this dog's on the job.

A helicopter crew from Brazilian news outlet Globo was in the skies over Sao Paulo when they encountered a rather surprising scene taking place below. There, along the concrete banks of an urban river, a solitary black dog was spotted single-pawedily clearing the waterway of floating plastic debris.

And, from the looks it, he was having a blast doing it.