Data from the first half of 2020 shows the pandemic’s impact on trade with U.S. agricultural exports down 3 percent compared with the same period in 2019. Meanwhile, there was a 4 percent drop in ethanol exports, which is a surprisingly small amount. While food demand changed, it mostly impacted the where and how – the total amount of calories consumed may only have changed at the lowest income level. By contrast, the Energy Information Agency says that global demand for petroleum and liquid fuels fell 8 percent in the first half of 2020.  Exports to Brazil, the largest market, were down 16 percent, no doubt adversely impacted by the weaker value of the real. Brazilian sugarcane production is up but is going to sugar inste...