The recent news about a family of four from Iowa found dead in their condo in Tulum, Mexico, brought to light a little publicized risk lurking in every kind of lodging. Carbon monoxide (CO) poisoning can happen within a matter of minutes and is responsible for more deaths than any other single poison.
When my tour guide handed me a personal Geiger counter to check radiation levels for a day trip to Chernobyl, the last remnants of my jet lag haze quickly lifted. I knew this was some serious business.