Global warming is a threat that may lead to death and disaster in decades to come. Meanwhile air pollution in the megacities of the world kills 7 million of people prematurely every year, according to statistics of the WHO. That’s an immediate threat. London is already the largest city with a congestion charge—anyone driving through the city center on a weekday has to pay $18.60. But with deaths caused by air pollution topping 4,000 a year, lawmakers want to raise the emissions charge even higher. Beginning in 2020 drivers of the most polluting cars that go through downtown London will have to pay an additional $20.