Step 3 Call a chemist!

You’re atmospheric chemist Susan Solomon, who thinks CFCs are responsible for the hole in the ozone layer, but you need to prove it. You have to go where the hole is . . . Antarctica. Moreover, you’ll start in August, when the average temperature is between –61°F and –81°F (–52°C and –63°C)!

Get your team and your instruments together and step aboard a plane to the land of icebergs and penguins. If you’d rather go to the beach, make sure to bring sun block.