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Re:Show HN: Make continuous reforestation part of your daily... by sooheon on Sunday March 21, 2021 @10:12AM (#26530589)
> From looking at CO2 levels, we will be reaching 1000 ug/m^3 in my lifetime

How did you arrive at this number? climate.gov article from last year estimates 900ppm by the end of the century if energy demand continues to increase at same rate and it is all met by fossil fuels.

https://www.climate.gov/news-features/understanding-climate/...

Re:Show HN: Make continuous reforestation part of your daily... by Robotbeat on Sunday March 21, 2021 @10:14AM (#26530607)
900ppm by volume is about 1000micrograms per cubic meter. The density of air at sea level is 1.2 kilograms/m^3.