And how might the U.S. Congress pass a form of carbon tax in 2025? So government policy has to come with us.” Mittal addressed some of the market challenges to increasing “green steel” production. Carbon Tax? But the key thing is that this CBAM credits you for whatever carbon price you’ve already paid. The consequence, Wolfram continued, is that countries without a carbon tax whose manufacturers export to the EU have begun thinking actively about carbon pricing.