Whoever thinks algebra is a trick in obtaining unknowns has thought it in vain. No attention should be paid to the fact that algebra and geometry are different in appearance. Algebras (jabbre and maqabeleh) are geometric facts which are proved by propositions five and six of Book two of Elements.
What we do to animals directly impacts everything, because we are all connected. It disrupts the food chain, it funds terrorism (ivory), it changes our climate, our oceans, it starts wars.