litter picking en · NOUN
Meanings
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(uncountable) The picking up of rubbish carelessly dropped by people, often organised by a group.
[…] they have also been out litter picking, returning railway character to the line, restoring structures, and adding picnic tables.
2025 August 20, Caroline Hardie, “The railway that changed the world”, in RAIL, number 1042, page 61: