OpenLitterMap is a Citizen Science litter-mapping game that enables anyone to map, reveal, communicate and resolve litter (e.g. cigarette butts, plastic bottles etc.) anywhere on the globe using any device- just log in! Users can submit geotagged images and tag litter to gain experience points, Level Up and compete in multiple different leaderboards if they choose to go public. All data from OpenLitterMap is mapped in hyper-spatial resolution, geospatially, quantitatively and categorically analysed and free to download by anyone.
In addition, OpenLitterMap rewards users with Littercoin for producing open data on litter. See here for further information.
If you would like to help shape the future of OpenLitterMap, you can join the slack channel & contribute to OpenLitterMap in three steps: 1) Just taking a photo, 2) tagging the litter, and 3) uploading it!!
If interested, you can download the app here