Swedish company trains crows to pick up cigarette butts
chinadaily.com.cn | Updated: 2022-02-03 01:37
A Swedish company based in Sodertalje is testing a reward-based system in which wild birds help humans pick up cigarette butts.
chinadaily.com.cn | Updated: 2022-02-03 01:37
A Swedish company based in Sodertalje is testing a reward-based system in which wild birds help humans pick up cigarette butts.