Th right to breathe seems like something worth dying for.
> The Clean Air Act 1956 was an Act of the Parliament of the United Kingdom enacted principally in response to London's Great Smog of 1952
> When the "Great Smog" fell over the city in December 1952 the effects were unprecedented: More than 4,000 people are thought to have died in the immediate aftermath,[4] raising public concern, with fog so thick it stopped trains, cars, and public events.[5] A further 8,000 died in following weeks and months.