Volkswagen has been forced to buy back 300,000 diesel cars, whose emissions levels it lied about and disguised from tests. These cars are sitting in the parking lots of various facilities that are not in operation. However, Volkswagen wants to sell them again someday -- not by modifying them to emit less greenhouse gas, but by modifying the regulations.

You can convince a government to fool itself, especially a planet-roaster government like that of the US. You can't do that to the climate.