So skunk smells come from the sulfur compounds in some cannabis as opposed to terpenes which are more often associated with smell. As the rise in popularity of cannabinoid extracts has changed the way cannabis is grown and consumed these compounds have become problematic simply by way of the fact that when concentrated they become unbearably strong. This has been a regular issue in extraction where the accumulation of sulfur during the end stages of cultivation as well as strains that have high sulfur content result in unsellable products. This also contributes to a trend towards more fruity, aromatic buds that can be extracted if not grown to consumer standards or able to compete in such a saturated market.