Well, by my Maths, 10^18 would require close to 7,000 trees for every square meter of dry land on the planet Earth. Even if we allow the use of Bonsai, that wou

Well, by my Maths, 10^18 would require close to 7,000 trees for every square meter of dry land on the planet Earth. Even if we allow the use of Bonsai, that would be a stretch :)