Tom Niven's (ESD 14 -15) change challenge this year was to assess if a worm farm could be used to recycle organic kitchen waste at his College and create compost for the College gardens. An article introducing the project and outlining his findings can be found in the Christs's College Newsletter "Pieces."
See page 7: https://issuu.com/christsalumni/docs/pieces_issue_29_web