The Air We Breathe
NASA
Our atmosphere is vital to all living things on our planet. How much do you know about the air we breathe?
Answer questions like ...
- Is ozone good or bad for humans?
- Is air quality in the U.S. better or worse on average than it was 20 years ago?
- For how long do dust and soot generally remain in the air?
Use the green Start Show button above to start playing!
