I think they're basing that calculation on this post (https://www.usda.gov/media/blog/2015/03/17/power-one-tree-very-air-we-breathe https://www.usda.gov/media/b

I think they're basing that calculation on this post (https://www.usda.gov/media/blog/2015/03/17/power-one-tree-very-air-we-breathe https://www.usda.gov/media/blog/2015/03/17/power-one-tree-ve...), which points here (https://www.arborday.org/trees/treefacts/#climate https://www.arborday.org/trees/treefacts/#climate), which links to the European Environmental Agency saying an average mature tree sequesters 22kg of carbon every year (https://www.eea.europa.eu/articles/forests-health-and-climate-change/key-facts/trees-help-tackle-climate-change https://www.eea.europa.eu/articles/forests-health-and-climat...). So, one tree is 22kg/year. So they're claiming their device will collect 6200*22=136,400kg of carbon per year from a truck.