...#CarIndustry, which had been lying about real NOx and other #GreenhouseGasEmissions (#GGE) for decades to develop an upgrade kit for each and every car they sold that does not meet environmental standards in real-life use. It was mass fraud, so they should be made to pay up.
As there were no regulations nor government subsidies, as there had been in the 1980's for #CatalyticConverters, upgrade companies either shelved many of their developments or went bust.//