Scientists make deadly discovery in New York City's subways

's subways have a reputation for being dangerous - but a new study has found the air is also deadly.

Commuters face deadly pollution levels in the subway that are up to 10 times higher than what is deemed a safe limit, a new study has revealed.

Researchers investigated levels of particulate matter (PM2.5) - tiny particles released through combustion - that can get deep into lungs and the bloodstream, where they cause damage linked to , cardiovascular disease and premature death.

Load More