U.S. ethanol exports during December-March were up 42 percent over the same period a year earlier. The increased sales are not due to the price of petroleum as there is a very low correlation between the two. Instead, demand is driven by efforts to reduce the carbon intensity of fuels, particularly in Europe. Demand for Sustainable Aviation Fuel is likely to drive even more exports in the future.  Brazil is the second largest market for ethanol after the U.S. While Brazil supplies ethanol to the U.S. duty free, American ethanol exports face a tariff in Brazil. Brazil has also been supplying feedstock for U.S. renewable diesel. According to Bloomberg, Brazil accounted for 40 percent of U.S. tallow imports last year. American purchases...