All car companies cheat on emissions tests—it’s just that most do it legally
▻http://qz.com/511064/all-car-companies-cheat-on-emissions-tests-its-just-that-most-do-it-legally
Extrapolating from German data, lab tests show that average EU auto emissions have fallen by 27% since 2001. In the real world, however, emissions are down by only 8% over the same period, and have shown little to no improvement over the past five years.