The 8th International conference on Energy and Sustainability will take place in Coimbra, Portugal from 3 to 5 July 2019. The successful series started in the New Forest, UK, home of the Wessex Institute in 2007; followed by meetings in Bologna (2009); Alicante (2011); Budapest (2013); Kuala Lumpur (2014); Medellin, Colombia (2015); and Seville (2017). The diverse topics covered by the Conference involve collaboration between different disciplines in order to arrive at optimum solutions, including studies of materials, energy networks, new energy resources, storage solutions, waste to energy systems, smart grids and many others.