Biodiesel is a clean burning alternative to petroleum derived diesel fuel. Biodiesel(s) are straight chain esters (methyl, ethyl) of fatty acids in the C12-C22 carbon range but mostly C18. On an industrial scale (>10^6 gals/yr), capital-intensive approaches have been demonstrated using virgin oilseed crops as the primary feedstock. Because of high capital and operating costs, virgin based biodiesel plants are getting larger (>10^7 gals/yr), diversifying feedstocks (e.g. adding animal tallows, palm oils etc.), utilizing government subsidies and tax credits, raising prices significantly, or going out of business. At smaller scales, ca. 10^4-10^5 gals/yr, traditional virgin feedstocks are not economically viable. Therefore, micro-biodiesel production depends on using waste vegetable oil, animal fat feedstocks, and developing new, more affordable, locally produced oil bearing feedstocks (e.g. canola, algae). GreenTech is gradually establishing viable micro-biodiesel production based on green economies such as waste utilization, local feedstocks, and product diversification instead of economies of scale. The talk will focus on the development to date of our pilot micro-biodiesel plant in Winooski, VT for small business/on-farm biodiesel production.