Hiring Crows as Street Cleaners
Crows are pretty smart. They even understand the concep... ...concept of trade, so we may as well harness their intelligence to improve our world. A Dutch company called Crowded Cities aims to train crows to pick up cigarette butts along r...
https://www.neatorama.com/2017/11/07/Hiring-Crows-as-Street-Cleaners/
