Daisy Martinez founded Trash Free Earth so her neighborhood park would look better. The idea spread and Trash Free Earth now hosts regular cleanups where a diverse collection of volunteers come together to make a park look beautiful.
Trash Free Earth has created a patch challenge. People who accomplish all five elements of the challenge receive an exclusive patch.
If a park hosts a cleanup, it will reinforce the idea that the park is responsible for cleaning up. If a community organization organizes and hosts a cleanup, it will spread the idea that the community is responsible for keeping their parks clean.