Policies to boost biofuel production and use—crop subsidies, mandates, and other measures—came under intense scrutiny during the food price spikes of 2007/08, 2010/11, and 2012/13. As prices of maize, grains, oilseeds, and other feedstocks rose in those crises—more than doubling in some cases—critics pointed to their increasing use in biofuel production as a major factor behind high global food prices.