Are biofuels worse for the climate than petrol and jet fuel?

Governments and the aviation industry have been promising for decades that fuel made from plants could solve the transport sector's CO2 emissions. Why hasn't it happened? John DeCicco, Professor Emeritus at University of Michigan, has been studying transport emissions & biofuels for decades. Alasdair asked him about the alarming findings of his research: liquid biofuels could be worse for the climate than fossil fuels. Further reading: 'Biofuels turn out to be a climate mistake –...