He likely is worried about the printed paper and tree cut down. I don’t agree that should be a worry here but I think that is what he is getting at.

A few billion sheets of paper?

Paper is a renewable resource. Trees are replanted when we cut them down to make paper.

This isn't the 70s anymore; all paper companies nowadays use tree plantations instead of random old growth, which means paper is now only about as damaging as regular food products.

Intensive agriculture is very damaging.

just call your credit card company(ies)/banks and demand they stop sending you offers in the mail

this action alone will save an enormous amounts of paper, orders of magnitude more than is required for every democratic action you'll participate in with our super low tech future (paper ballots for all), and nicely reduces the amount of shipping/logistics etc. that your local mail delivery service has to do. massive win-win for the planet and democracy

> just call your credit card company(ies)/banks and demand they stop sending you offers in the mail

Yes, I already did that. Everyone should too as well.

The USPS has subsidized junk mail. I have a mail scale, 90% of the mail sent to me is complete junk. Non-market based entities have no incentive for efficiency.