The 20mg/ml I mentioned is sold as 2% as well, yeah. I can only guess, but I think the main driver is probably more just general health and the amount people a

The 20mg/ml I mentioned is sold as 2% as well, yeah. I can only guess, but I think the main driver is probably more just general health and the amount people are (intentionally) putting in their bodies more-so than the potential for poisoning. Canada limits everything to 20mg/ml. That keeps a typical disposable at 40mg total, but that's probably actually less of a concern since those are generally pretty well sealed. (The manufacturer doesn't want you refilling them when instead you could throw all the electronics and lithium battery straight in the garbage and buy another one! If we actually wanted to do something for the environment, this should have been made illegal two minutes after someone thought it up.) The bigger concern for poisoning would be the vape juice that's sold for filling the refillable vapes. It's just liquid in a bottle generally sold in 30 and 100ml quantities. Even at 20mg, that gives you a total of 600mg and 2,000mg. So a little 30mg bottle that people leave laying around their house has enough in it to make an adult seriously ill or potentially kill them, and a 100ml bottle has enough that you're well into "most people will die if they drink all of this" territory. This is obviously even more of a concern for kids. Limiting the concentration to avoid the risk of poisoning would be like limiting vodka to being sold at 5% alcohol or something. It's still a risk of poisoning and it's no longer serving its original purpose.