1 ply toilet paper is made of a single layer of paper, while 2 ply has two layers of the same material. In most instances, 2 ply toilet paper is typically thicker and stronger, and is usually a bit softer as well, which many attribute to being the better of the two from a comfort standpoint.

Unfortunately, paper industries use chlorine and chlorine dioxide to bleach it. Bleached paper is believed to be the most carcinogenic chemical known to science! These chemicals react with organic molecules in the wood and other fibers to create many toxic byproducts, including dioxin

So it would take about 8 of these trees to produce between 1,000 and 2,000 pounds of paper, Since a typical 500-sheet packet of the paper weighs 5 pounds, that's 10,000 to 20,000 sheets per tree, which doesn't sound all that bad.