Marijuana: 1960s versus today

WHERE IT COMES FROM

Then: Almost exclusively imported.

Now: An estimated 80 per cent is domestic, resulting from cold weather
growth seeds.

POTENCY

Then: THC content of less than 10 per cent.

Now: THC content of 10 to 15 per cent, although some strains contain 25 per
cent.

WHAT IT'S WORTH

Then: $20 an ounce.

Now: $250 an ounce.

WHO USES

Then: The young.

Now: The young, the old, the unwell.