Actually this is nothing new, pot has always come in different strengths of THC, there's low grade, mid grade and high grade. THC potency is effected by sun light, temperature at which it is stored and handling practices among many more. THC potency in a marijuana plant has a point of peaking, and after that it degrades. Maybe it was the first time they got a quality sample that had not degraded yet, timing is everything. So if its stronger you can smoke less and be even more healthy for doing so.

The only reason this little piece of news is out today is because there are some people that stand to profit of the fact it is illegal and they see the polls and all the momentum legalization has as of late, so of course an article that makes pot sound dangerous is going to come out, they are trying to protect their financial interest, the only problem is its too late, the majority now knows the truth and we are not going to stop until there are fair laws in place, period.

I do like the use of words such as "predicts" and "may"
They "MAY" not limit intake, and it "MAY" cause irritability

he "PREDICTS" that THC levels will rise and level off in around 5 to 10 years.

Ok so lets put everyone in prison, that's the answer, we have plenty of tax money so we can turn non violent tax payers into tax burdens for the rest. Wow, force is always the right answer in America I guess.