Ozone pollution—what we call smog-- can affect even the healthiest among us. It can cause sunburn-like damage in our lungs. Not an area we can reach when slathering on the sunscreen! But just as with the sun, some of us can be even more sensitive than others to ozone pollution. Unfortunately, some of the sensitivity has to do with how deeply we are breathing, which is why outdoor recreationists are considered among the sensitive groups affected by ozone pollution. There are ways to protect ourselves. EPA and state air regulators announce when smog is expected to be high so people can take precautions. Even more important, we can let President Obama know we want fewer smoggy days so he should urge EPA to set stronger, more protective ozone smog standards.