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 ...
- What are sources of nitrogen dioxide?
- Is air quality in the U.S. better or worse on average than it was 20 years ago?
- In the 10,000 years before the Industrial Revolution in 1751, carbon dioxide levels in the air rose by less than 10 percent. Since then they’ve risen by:
Use the green Start Show button above to start playing!
