B3, 2021, Anderson

2. The most common man-made greenhouse gas.
3. An unnatural GHG producer beginning during the 1800s.
5. Unnatural gas that deteriorated the ozone layer over the arctic, Abbr.
8. The largest producer of manmade greenhouse gases by humans.
15. The largest contributor to climate change.
16. Ozone that has descended slightly into the troposphere, acting as a GHG.
17. AKA laughing gas, but also a GHG.
19. Cause of the ozone layer, Abbr.
20. Higher heat input than output into an atmosphere.
21. # of degrees cooler the earth would be without the GHE.
22. A natural GHG producer that was exacerbated by humanity.
23. Layer in which the aurora borealis originates.

1. The most naturally abundant gas in the atmosphere.
4. The layer of the atmosphere that weather occurs in.
5. A greenhouse gas that doesn't absorb heat, but instead contributes to the effectiveness of other gases.
6. A common ingredient to the most damaging of manmade greenhouse gases.
7. Atmospheric layer that meteorites burn up in.
9. The layer of the earth's atmosphere that contains the Ozone Layer.
10. A highly potent GHG that is largely produced by agriculture.
11. The term for the separator between two atmospheric layers.
12. A very 'noble' contender for the third most abundant atmospheric gas.
13. The most common greenhouse gas.
14. A natural process of insulation regulating the interior temperature of the atmosphere, Abbr.
18. The second most abundant atmospheric gas, what most people would guess to be the first.
24. One gas from the early atmosphere before our current one.