From October 17, Canadians will be able to light a cannabis cigarette with complete impunity. The North American nation will become only the second country, after Uruguay, to fully legalise marijuana use for recreational purposes.

The move will make good on a campaign promise from Justin Trudeau, who swept into the prime minister’s office in 2015 guaranteeing a new liberalised, socialised Canada. That means Canadians will be able to purchase, grow and smoke to their heart’s content, and the national medical community will have free rein to study the plant’s potential health benefits.