Question

The ozone layer sits near the top of Earth's atmosphere and protects us from the sun's harmful ultraviolet rays. But ozone is dangerous when it's closer to ground level. Which of the following describes ground-level ozone?

Answer 1

Answer: Ninety percent of the ozone in the atmosphere sits in the stratosphere, the layer of atmosphere between about 10 and 50 kilometers altitude. Ozone protects life on Earth from the Sun's UV radiation. The ozone layer in the stratosphere absorbs the most harmful UV rays from the sun before they reach Earth's surface.