Reports state America is facing a severe DEF shortage due to the main supplier China switching from using synthetic urea for DEF made from natural gas and CO2 into fertilizer production. American producers must be doing so also. This will impact supply chains dramatically. We could be swimming in diesel and without DEF, the trucks won't run. As if the industry needs any more bad news... Biden should direct American producers to full production of DEF under his emergency authority. He should, but we'll see...