You'll have to be 21 to buy cigarettes or vape products in Washington starting Jan. 1, 2020 KNKX Public Radio Is Vaping Marijuana Safer Than Smoking? More than 11% of U.S. 12th graders used psychoactive delta 8 THC last year, study finds Denton smoke shops prepare as Texas outlaws THC vapes, Chinese made e cigs and more starting Sept. 1 KERA News Vaping Marijuana Has Stronger Effects Than Smoking, Study Finds CardioSmart American College of Cardiology