How we help businesses transition to LED Lighting. How we help businesses transition to solar. We exist to inspire and engage residents and businesses in the City of Yarra to take practical steps towards a carbon free future. Join us? Dec 15, 2016. YEF has a double pass to giveaway for this solar powered celebration dedicated to transforming the cities we live in. Low Carbon West Preferred Suppliers EoI Now Open. Nov 30, 2016. Energy Smart Schools in the City of Yarra - 2016 Info Session. Oct 05, 2016.