Susuto

“Judged by its carbon footprint, wool may be more benign: Sheep graze freely on unfertilized grass, although their digestion of vegetation produces methane, which is a potent greenhouse gas”

I do NOT think that growing a sheep is more ‘eco friendly’ or efficient than growing hemp.

“And polyester (manufactured from petroleum) may have the smallest impact on climate, according to Goodall. “When you make a piece of plastic that lasts, in effect, forever, you are taking hydrocarbons and sequestering them in an essentially indestructible piece of textile,” he says.”
And “producing an equivalent amount of polyester requires little or no water.”

Right, except when the train full of deadly chemicals turns over in your town. And since when is the measure of ‘eco friendliness’ solely measured by water use?