A one-year-old Chinese boy has taught a litter bug a lesson by picking up a plastic bottle thrown onto the pavement by the driver through the car window.
The toddler then gave the piece of rubbish back to the motorist by passing it to him through the same window.
It is likely that the boy thought the driver had dropped the bottle by accident and was trying to help, according to his mother.
Web users have flocked to praise the child and urge adults to learn from him after a video of his act went viral on a Chinese video app.
The toddler, named Sun Jiarui, lives in the city of Jining in eastern China's Shandong Province.
The event was captured by Jiarui's mother as the pair walked in their residential complex on Monday, his mother told MailOnline.
The parent, named Jing Lulu, has the habit of filming her son learning to walk whenever they go out. The 34-year-old woman recorded the incident by chance.
Jiarui is a polite and curious child and always respects the elderly, according to Ms Jing.
'That day, he probably thought the bottle had fallen from the car by accident. He is a very simple child. If he sees other people drop stuff, he always helps to pick up,' she said.
'He is only one year and three months old and probably doesn't have a strong sense of environmental protection, but his action taught the driver a lesson,' Ms Jing added.
The footage of the boy's behaviour has become trending on short-video platform Douyin, with people swarming to give kudos to the little boy.
One person commented: 'Moral fortitude has nothing to do with the age.'
Another viewer wrote: 'The baby is too cute and the driver should feel ashamed.'
Jiarui's mother said after the boy returned the bottle, he ran back to her and the motorist wound up the window without saying anything.