Maybe this helps: if most Americans plant 3 trees, that's about a billion trees. When I was young and part of a crew, each us planted -several hundred- trees o

Maybe this helps: if most Americans plant 3 trees, that's about a billion trees. When I was young and part of a crew, each us planted -several hundred- trees over 3 eight-hour days. So at least a thousand per person in 10 days. A nation-wide volunteer org -with access to enough seedlings- ... that's the tricky part ... could quickly multiply that to 300 per American - 10% of that trillion.