London is officially the first city to have an Ultra Low Emission Zone (ULEZ). The zone, which is active all hours of the day and night, will improve air quality in the city by cutting down on pollution caused by vehicle emissions.

Any vehicle traveling inside the ULEZ will have to meet strict emission codes or be subject to fines. Scientists believe that vehicle emissions, specifically nitrogen oxide, account for the majority of air pollution in London and are a serious threat to public health. These harmful chemicals have been known to increase risks of dementia and cancer.

Related: Teens exposed to air pollution more likely to experience psychotic episodes, new study says

“This is a landmark day for our city. Our toxic air is an invisible killer responsible for one of the biggest national health emergencies of our generation,” London Mayor Sadiq Khan shared.

The ULEZ was activated on April 8 and any vehicles traveling inside the zone that do not meet emissions standards will face charges of around $16 per day. Larger vehicles, such as trucks and buses, will have to pay heftier fines upwards of $130. The zone currently covers an area roughly four miles in size and will be expanded to a much larger area by the fall of 2021.

The ULEZ is part of a larger plan to discourage high-emission vehicles from travelling around London. The first stage of the plan initiated what was called a T-charge, which went into effect in the winter of 2017. In the two years since, London has witnessed a drop of around 11,000 vehicles every day from the targeted area.

The plan has also increased the number of vehicles becoming compliant with emissions standards in the area. The city’s famous fleet of red double-decker buses, for example, is being upgraded to comply with the new ULEZ.  There are approximately two million residents who live inside the ULEZ, and officials hope the new plan will improve the quality of air so that it meets standards enacted by the European Union.

London may be the first city to enact an Ultra Low Emission Zone, but other locations, like New York City, are looking into similar plans.

Via CNN

Image via Shrinkin’ Violet