Also, something in the Los Angeles smog was destroying rubber tires and damaging crops ... above the Earth’s surface—where a layer of ozone absorbs harmful ultraviolet radiation (see article on p. 12) ...

Los Angeles’ air quality is closely tied to weather patterns. Clear, breezy days help disperse pollution, while stagnant air, overcast skies, and heat can trap smog and worsen conditions.

Although it is too late to help Los Angeles’ beloved mountain lion P-22 expand his territory, the passage will allow mountain lions and other wildlife to range farther for food and mates.

Los Angeles has the worst ozone pollution in the ... High above us in the stratosphere, the ozone layer is beneficial, absorbing some of the sun’s harmful UV radiation and preventing it from ...