According to According to the UN Food and Agriculture Organization, food waste – if it were a country – would be the third largest source of greenhouse gas emissions in the world.  Reducing food waste can help reduce these emissions, feed those who are hungry, and improve food security.  Food waste experts tell Carbon Brief that “food loss and waste” remains a “major problem.”  It is said that there are a number of solutions to address this problem, but more measures are needed to implement such measures.  This detailed Q&A outlines why food waste causes emissions, why it has become such a big problem, and how countries and companies plan to reduce waste in the coming years. (ORLA DWYER)