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Engr305 Appropriate Technology Projects: Below are selected service learning projects from Engr305 Appropriate Technology, which is a course on appropriate technology at Humboldt State University taught by instructor Lonny Grafman.

HBCSL cobb oven A cobb oven for the Humboldt Bay Center for Sustainable Living   HBCSL solar shower A solar shower for the Humboldt Bay Center for Sustainable Living   Jefferson Community Center compost A large composting system for Jefferson School   Jefferson Community Center E305 teach-in A vermicomposting workshop   Kiva's straw bale greenhouse A straw-bale greenhouse   M Street Eureka rainwater catchment A rainwater catchment system for residential property   Mattole Community Center rainwater catchment A rainwater catchment from the roof of the Mattole Valley Community Center in Petrolia   Millcreek greywater A residential greywater processor   Old Growth Cellar rainwater catchment A rainwater catchment system for Old Growth Cellars