Air pollution - Outlook 2020 (Luxembourg)

Although emissions of SO₂, NMVOC and NH₃ (ammonia) are expected to decrease further in the future with the introduction of new European legislation, it remains to be seen whether this will also apply to NO_x emissions. Although more stringent European emission standards for mobile sources have recently been put in place, or are planned for the future, they will not necessarily reduce NO_x emissions from the transport sector, as actual emission measurements have shown that the previous European emission standards did not bring about the anticipated reduction.