You’re spending too much time at the gas station.
Unless you live in New Jersey, where it’s illegal to pump your own gas, odds are that you fill your gas tank yourself on a semi-regular basis. Unfortunately, according to Li, this common practice can actually damage the body.
“If you are pumping gas and smelling the fumes, you are inhaling toxic chemicals that can damage the DNA in your lungs,” he explains. “The solution: stand downwind [when you pump], or go electric.”