Soybean production for China's hungry population should be kept squarely in the places whose natural environments have already been sacrificed. That protects biodiversity elsewhere. Those "elsewheres" contain the forests that lock away carbon dioxide for us, reducing climate change. The fewer the planet's trees, the more flooding, wildfires and extreme weather we are likely to have. We are also likely to have more tropical infectious diseases in the U.S. as our climate warms up. Trees keep the soil in place, too, reducing erosion and preventing silt from choking rivers — a common nasty side effect of deforestation. The tropical forests and savannas of diverse "elsewheres" also contain the biodiversity that could provide us with compounds for new medicines in the future — unless that biodiversity is destroyed before we get the chance. The environments endangered by soy's role in a trade war even help to regulate rainfall patterns over vast regions, such as the Amazon. Every forest that is newly chopped down, every savanna whose natural balance is newly commandeered for soy agriculture, represents a loss to human well-being.