Effects of biofuels on greenhouse gases

Ethanol has the largest share in the biofuel market. Its market grew very fast in connection to the more concern on global environment and crisis in energy market. It resulted in many debates if ethanol reduces greenhouse gases or not. Some people were/are optimistic and some pessimistic. There is also similar debates about other biofuels, including biodiesel (RME) and biogas which are avialable in Swedish market. A recent life cycle analysis from Lund University show that all these biofuels results in reducing greenhousue gases by different degrees from 68% up to 148%!

(Reduction of greenhouse gases by using different biofuels. Ref. here)