Saturday is the final day of Operation Clean River, launched on March 22 to mark World Water Day.
More than 200 Operation coordination centres have been registered throughout Poland, with near on 4700 volunteers participating in a nationwide drive to clean up major Polish rivers, their tributaries and surroundings.
This Saturday, 202 clean-up projects are scheduled in 14 voivodships, involving more than 3,000 volunteers.
Since Operation Clean River started in March, participants have collected some 30 tonnes of rubbish from waterways, banks, neighbouring woods and recreational areas. As the current event is being held with COVID-19 precautions in place, teams are small.
A total of 55 tonnes of rubbish were collected in the first edition of the event held in 2019. Expectations are for a far bigger amount this year.