I found this on the internet. It doesn't mean that marijuana is "less dangerous" than sodapop, of course. But, facts are facts.
Soda - sugar, caffeine
Soda - Obesity, tooth decay, diabetes
Marijuana - Short term impairment, lung trauma if ingested via smoking
Soda - caffeine is an addictive chemical
Marijuana - none, although psychological addiction is common
Soda - Coloring, flavor additives, sweeteners ex-sugar
Marijuana - None
Soda - Most doctors recommend none or limited
Marijuana - Effective palliative for cancer-treatment and AIDS-treatment related nausea, glaucoma (reduces pressure in eyes)
Soda - Sold in public schools
Marijuana - Illegal in most states. But widely available in all high schools.