Which is the main characteristic of the quebracho tree?
Correct answer: It produces tannins.

Cha Cha
I'm really wishing that a suitable sustainable alternative to tannin could be found and an alternative to clearing forest and rainforest for agriculture could be adopted. We need our trees, especially the rainforests!!

mitch
Cha Cha, There is an alternative for leather anyway- it's called human urine.