There's been a semi-constant trend lately regarding major cities throughout the world cracking down on cars. More specifically, they don't want them due to excess pollution. And now London Mayor Sadiq Khan, according to Reuters, is pushing ahead with a plan to charge a $16 fee (not $12 as previously reported) for the most polluting cars and trucks to enter the city. Khan, who also happens to suffer from asthma, wants to turn London into one of the greenest cities in the world, and his first step in making that happen is the Ultra-Low Emission Zone (ULEZ).

This new standard will begin to be rolled out in April 2019 instead of the originally planned September 2020, which was set by Khan's predecessor, Boris Johnson. ULEZ will specifically apply to "all petrol (gasoline) vehicles which do not meet Euro 4 emissions standards and all diesel models which do not comply with Euro 6 standards." Khan stated that "the air in London is lethal and I will not stand by and do nothing." If all goes according to plan, London will be the first major city to actually forbid certain gasoline and diesel cars and trucks from entering without paying a fee. Other cities, such as Paris, Athens and Madrid are trying to crack down on polluting vehicles as well, but London is clearly taking the lead.