[olyjohn]

Weed is worse per breath, you mean. That's the only thing you can say here.

Nobody is smoking 10-20 joints per day. People who smoke cigarettes are burning through a pack every few days. A pack is 20 cigarettes. Some people smoke 1-2 packs of cigarettes per day. It's not atypical to hear about people smoking a couple packs per week.

If you tried to smoke that much weed, you're going to be useless and have lots of other problems too. The lung problems will be the least of your worries.

[graeme]

Good point. I assumed they meant the method of smoking. If they meant quantity then yes it’s true you don’t smoke nearly so much marijuana as tobacco.