“Palo Santo, for instance, doesn’t yield valuable oil until it’s around 80 years old,” explains Aeir co-founder Enrico Pietra of his reasoning to go fully synthetic from the get-go. “If you have to chop down a decades-old tree just to extract [its fragrance], it’s not the most sustainable. Regardless of how amazing your packaging might be, or how you’ve reduced your carbon footprint by not using glass, I think at the end of the day it really starts with what you’re putting inside the bottle, which is the product.”

— Read more in A New Class of Eco-Conscious Fragrance Makers Wants to Make Your Cologne More Green at Robb Report.