Twice the harm

Skunk strength has doubled, studies suggest | Special reports | Guardian Unlimited

There's always a lot of argument around the issue of the increasing strength of cannabis over the years. It would seem that, in England at least, there is clear evidence that the average strength has doubled in the last 10 years.

I assume something similar would have gone on in Australia too.

It also adds some weight to my scepticism about claims that the additional harmfulness of modern, hydroponic cannabis is due to the fungicides and other chemicals used on it while it is growing.