Learn about bongs, weed stems and more in Ask an Expert with Dr. Markus Roggen: Episode 4 Dr. Markus Roggen, PhD. has a doctorate in Chemistry. He is the founder and CEO of Complex Biotech Discovery Ventures… By hempcbdtimes , in Ask An Expert bong water Cannabis Cannabis 101 Cannabis Canada cannabis stalk culture Dr. Markus Roggen Editorial Education Episode 4 featured gravity bong Health Health & Sex interview Marijuana News science series stem Technology terpene THC , at October 3, 2020
