The Trump Administration announced last week its Agriculture Innovation Agenda, which included the target of a 50 percent reduction in the sector’s environmental footprint by 2050. The details for accomplishing this goal are vague. Not to be outdone, some Congressional Democrats have introduced the Agriculture Resilience Act, which calls for zero emissions from the sector by 2040. The plan is very specific in that it calls for year-round cover crops on 75 percent of farmland. Endorsing the plan was the National Farmers Union since it has always sought supply controls to artificially boost farm income.  The whole sustainability movement still lacks common metrics and sound science. One livestock expert points out that some consum...