Energy, exergy and exergoeconomic analysis are often used for assessing large energy conversion systems. However exergy and exergoeconomic analysis are rarely used when small or medium scale energy generation systems, such as community CHP/CCHP plants or microcogeneration systems are evaluated.

The carbon and environmental footprints associated with the global production of biofuels have been computed from a baseline of 2007–2009 out until 2019. Estimates of future global biofuel production were adopted from OECD–FAO and related projections. In order to determine the footprints...