What is Ozone?

Ozone is a type of molecule that is made of 3 connected oxygen atoms, which is written in scientific terms as O3. It is mostly found in the stratosphere, and absorbs harmful ultraviolet radiation that would otherwise find it's way down to us and cause a variety of problems for humans, animals, and plants. Stratospheric ozone is different from ground-level ozone, which contributes to smog in our cities.