A petition has started for fast food chains to print vehicle number plates on packaging to help stop litter.
The call comes after McDonalds, KFC and Burger King re-opened sites as the coronavirus lockdown measures ease.
However, the restart has already seen a marked increase in rubbish littering roads and pavements.
Welsh party Plaid Cymru has launched the petition.
It states: “Fast Food outlets reopened in Wales on Monday 2 June.
“Since then we have seen an increase in the litter dumped in our communities after visits to the drive-through.
“People should use the bins provided or take their litter home.
“Throwing it out of the car is not acceptable.
“We are calling on Welsh Government to make it compulsory for fast food outlets with drive through facilities to print car number plates on all packaging so that litter can be traced. ”
People have taken to social media to express anger at fast food litter ending up on the streets, in recent days.
One posted: “‘McDonalds you can tell that your drive thrus have reopened.
“Your litter has reappeared on the country roads and lanes around my home.”
A Welsh Government spokesman said: “Littering is not acceptable – we would urge everyone to act responsibly and throw their rubbish in the bin.
“We are committed to tackle littering in all its forms.
“Our main aim is to prevent it from occurring in the first place.”
A McDonald’s spokesman said:
“We produce packaging, not litter, and 80% of this is currently recyclable, with clear instructions displayed on the outside as to how to responsibly dispose of and recycle it.
“Bins are provided both in restaurants (when open) and car parks to encourage our customers to bin their litter, our restaurants carry out three litter patrols a day to pick up after irresponsible litterers.
“We actively partner with governing bodies and leading experts on litter prevention campaigns.”