It remains to be seen if U.S. regulators will share Jaguar Land Rover's enthusiasm for diesels going forward; until the new administration signaled its intention to relax
fuel economy and emissions standards, prospects for diesel in the U.S. looked limited at best, with impending 2018
legislation making VW throw in the towel instead of waiting for the regulatory regime to tighten.
While US
emissions are decreasing slightly — both as a result of the administration's policies on renewable energy
and vehicle
fuel economy standards
and because of sharply lower natural gas prices that have reduced coal use for electricity generation — it is unlikely that without additional regulation or
legislation that the US will meet its 2020 target.