Why do you suppose that is the case? Is the cost per tree too great? Are you pessimistic about lowering that cost via automation? I read recently about drones that can drop large numbers of pods containing fertilizer and seeds over a huge area in little time; it doesn’t seem infeasible to iterate on a concept like that and drive down the costs considerably.

Article says "The United Nations’ Trillion Tree Campaign has planted nearly 15 billion trees across the globe in recent years."

this comment is a great example of baseless couch-general type of pessimism

Uh “Each year Americans plant at least 1.6 billion trees or about 6 trees for each one we use.”

- according to 5 sec of googling

We're on the way to drive billions of dollars for forest restoration via carbon credits. With economic incentives that work it absolutely possible.

I'm the founder of Pachama (YC W19) where we're working to help make this market efficient and accountable.

Any solution would need multiple avenues. Abandoning each avenue because it isn't a total solution by itself guarantees defeat.

Well, not with that attitude.