I feel it, I drink milk seldomly but oat works when I crave some cereal or want to lighten up my coffee every now and again. Soy is a solid choice though as well, pretty even with oat when it comes to global impact!
For sure, my coffee stays black 95%+ of the time but change is the spice of life. Nonetheless, you highlight a solid point regarding the consumption of coffee. Being soo prominent world wide must make it detrimental environmentally.