Canada's growing marijuana problem

"All this," he says, "was built on marijuana."

Over four years, Frank - not his real name - tended a patch of marijuana plants in a forest clearing about 45 minutes' walk from where his cabin now stands.

He regularly pooled his harvests with those of several other growers in the small British Columbia (BC) town in which he lives, to sell wholesale to young men from just across the border in the US state of Idaho.

Frank says he made hundreds of thousands of Canadian dollars before hurriedly leaving the business when his American buyers were arrested.

But tens of thousands of illegal "grow-ops" remain in Canada. Estimates suggest marijuana may generate up to C$7bn (£3.5bn; US$6.1bn) a year in BC, the sunny province thought to be at the heart of the industry.

Canada's new Conservative government says people like Frank are a menace to society, putting drugs on the streets and fuelling organised crime - and it has vowed to get tough on them.

But critics accuse the government of being wilfully blind to the historic failures of law enforcement, and ignoring public opinion and the findings of expert committees in favour of a policy of demonising marijuana - a policy they liken to the short-lived Prohibition of alcohol in 1920s and 30s America.

Vietnam roots

Growing marijuana in BC's thinly populated and rugged interior, Frank was continuing a tradition - of sorts - said to have arrived with some 50,000 young American men seeking to avoid being drafted to fight in the Vietnam war.

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