One of the larger projects undertaken by fab labs include free community FabFi wireless networks (in Afghanistan, Kenya and US). The first city-scale FabFi network, set up in Afghanistan, has remained in place and active for three years under community supervision and with no special maintenance. The network in Kenya, (Based in the University of Nairobi (UoN)) building on that experience, started to experiment with controlling service quality and providing added services for a fee to make the network cost-neutral. Fab Academy Fab Academy leverages the Fab Lab network to teach hands-on, digital fabrication skills. Students convene at Fab Lab "Supernodes" for the 19 week course to earn a diploma and build a portfolio. In some cases, the diploma is accredited or offers academic credit. The curriculum is based on MIT's rapid prototyping course MAS 863: How to Make (Almost) Anything. The course is estimated to cost US$5000, but varies with location and available scholarship opportunities. All course materials are publicly archived online here. Fab City Fab City has been set up to explore innovative ways of creating the city of the future. It focuses on transforming and shaping the way how materials are sourced and used. This transformation should lead to a shift in the urban model from 'PITO to DIDO' that is, 'product-in, trash-out' to, data-in, data-out'. This can eventually transform cities into self-sufficient entities in 2054; in line with the pledge that Barcelona has made. The Fab City links to the fab lab movement, because they make use of the same human capital. The Fab cities make use of the innovative spirit of the users of the fab labs. Green Fab Labs The Green Fab Lab Network, which started in Catalonia's Green Fablab, is made up of fablabs that embrace the concepts of an open source symbiotic economy and the circular economy through green entrepreneurship. For example, they promote distributed recycling, where locals recycled their plastic waste turning locally sourced shredded plastic into items of value with fused particle fabrication/ fused granular fabrication (FPF/FGF) 3D printing, which not only is a good economic but also a good environmental option. List of labs MIT maintained a listing of all official Fab Labs, worldwide, until 2014. Nowadays listing of all official Fab Labs is maintained by the community through website fablabs.io. As of November 2019, there existed 1830 Fab Labs in the world in total. Currently there are Fab