Her answer was so hushed that it seemed barely more than an exhalation of air.

NEWYORKER: Miracle Polish

Here's what chemistry students know: For some reason, Caesar's dying breath, his last exhalation, has become a classic teaching tool in high school and college.

NPR: Commemorate Caesar: Take a Deep Breath!

What it comes down to in pollution parlance regarding humans and other species is that kids may demonstrate seven times more inhalation and exhalation rates than their parents, meaning, they absorb far more pollutants from off adjacent freeways into their lungs (a clear-cut case of a social justice issue, among other things).

FORBES: List: America's Most Polluted Cities