China Planted 78 Billion New Trees, and Seriously Messed Up Its Water Cycle
(www.popularmechanics.com)
The us plants about 2.3 trillion corn plants per year. 25,000 per acre, 95,000,000 acres. Considering they plant 68,000,000 trees per year just for paper, in the US, the numbers aren't shocking. Worldwide tree nurseries probably dwarf that 1.6 billion, maybe.