Well, fun fact: there is more helium in atmosphere (5.2 ppm) than methane (1.8 ppm). And it's not much less than neon (18 ppm). [1] https://climate.nasa.gov/ne

Well, fun fact: there is more helium in atmosphere (5.2 ppm) than methane (1.8 ppm). And it's not much less than neon (18 ppm). [1] https://climate.nasa.gov/news/2915/the-atmosphere-getting-a-handle-on-carbon-dioxide/ https://climate.nasa.gov/news/2915/the-atmosphere-getting-a-...