I heard that in India they are not allowed to export rice. Also that 80% of rice exported comes from Asia. However do you think that maybe global warming is causing the shortage if not, why?

GW, through crop failures from floods and drought, has contributed to food (including rice) shortages (and, no, no one is making it up or storing too much - strategic food stocks are at their lowest for many years).However the push to biofuels and increased meat consumption are also significant causes of this year's crisis