1 / 4   At least 14.5 million people from 152 countries participated in the campaign on World Cleanup Day Saturday, trying to make it as the biggest-ever single day of volunteer-based waste collection efforts. /VCG Photo

2 / 4   The campaign was initiated by the movement Let’s Do It! The world, calling people to “come together to rid our planet of trash - cleaning up litter and mismanaged waste from our beaches, rivers, forests and streets.” /VCG Photo

3 / 4   Full results of the activity, including the amount of waste collected, are expected to be released on Sunday. /VCG Photo

4 / 4   Social media users have been sharing their photos and thoughts on the event, using hashtags including #WorldCleanUpDay, #LetsDoit and #suituptocleanup. /VCG Photo