Green Machines
- Episode aired Apr 14, 2008
- TV-Y
- 25m
![Design Squad (2007)](https://m.media-amazon.com/images/M/MV5BMjQwMWMyNTQtZTEwNy00OWMyLWI1YzgtZjAxOTVlM2NlNDMxXkEyXkFqcGdeQXVyMzAxNTY5MzY@._V1_QL75_UX190_CR0,2,190,281_.jpg)
Two Food Project volunteers challenge the teams to design a compost lifter for their urban farm.Two Food Project volunteers challenge the teams to design a compost lifter for their urban farm.Two Food Project volunteers challenge the teams to design a compost lifter for their urban farm.