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Grittyville, WA

We were breathing at least one kind of 420 in April:

https://ca.news.yahoo.com/co2-mauna-loa-exceeds-420-151500418.html#:~:text=CO2 at Mauna Loa exceeds 420 ppm for,for the highest level measured in human history.

If you've never looked at the data direct from the source it's kinda interesting.

https://gml.noaa.gov/ccgg/trends/

William Warnock grew his 400 lb (world record in 1900) pumpkin at under 300 ppm CO2. (296 ppm back then).

5/29/2021 3:18:37 AM

Grittyville, WA

Shorter link to the article:

https://ca.news.yahoo.com/co2-mauna-loa-exceeds-420-151500418.html#:~:text=CO2

5/29/2021 3:21:02 AM