FAQ: Why does today's cannabis seem so much more potent than years ago?

Q: Why does today's cannabis seem so much more potent than years ago?

• In the 1970s, a lot of marijuana contained stems, seeds and fan leaves along with THC-rich flower buds; today, it's mostly flower buds.  A lot of 1970s marijuana was grown in Colombia and shipped to the U.S.; now, it's mostly homegrown, or grown locally and so is fresher and more potent, too.
• Cannabis cultivators of today have focused on growing high THC content flower.