In response to a string of deaths, Airbnb CEO says it's 'really hard' to make hosts install carbon monoxide detectors

• Airbnb CEO Brian Chesky spoke to NBC News in an interview set to air on Sunday.
• Chesky said it is "hard" to enforce a carbon monoxide mandate across 220 countries and regions.
• NBC News reported that at least 19 deaths at Airbnbs involved carbon monoxide poisoning.

Airbnb CEO Brian Chesky said enforcing certain safety measures, like carbon monoxide detectors, across all listings worldwide is "very hard."