Soy milk is hundreds of years old. I haven't seen any evidence to suggest that the hormone drop is caused by soy milk. American bison digest far better than cows and don't produce methane. What is natural about millions of cows in factories producing milk? Additionally these cows are being fed enormous amounts of gmo monocrops in order to produce. Almond milk is indeed a wasteful product, but the misallocation of scarce water due to regulation is not the same thing as greenhouse gases.