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Today I'm talking with Von Walden, an atmospheric scientist at Washington State University.

• Hear about Earth's bubble of gases AKA the atmosphere
• Learn why clouds can be weird in the polar regions
• Find out what an expert thinks about climate change—and how optimistic he is about the future

Resources You Can Use

• Check out AMNH's climate change resources
• Watch these polar bear cams
• Learn more about the polar regions
• Find out more about clouds and make a cloud in a jar

As always, submit burning questions at askdruniverse.wsu.edu. Who knows where your questions will take us next.