[ssijak]

1B hectares od trees is much different than 1B trees

[goatlover]

Up to 2500 hundred trees can be planted in a hectare. Which is over a trillion trees. I think that coincides with an article on planting a few trillion trees to offset climate change.

[geogra4]

Each human being on this planet just needs to plant about 140 trees - to give a sense of the scale of this number

[etrautmann]

On face value that sounds absurd, though in reality seed distribution may be automated and scaled in a feasible manner. Certainly the number of corn plans planted in the US alone must be an astonishing number if calculated per capita.