Updated at 8:05 p.m. ET

Recreational marijuana may soon be legal in Canada, after both the House of Commons and the Senate approved the Cannabis Act. Legal sales are likely to begin before the end of summer after the Senate voted 52-29 Tuesday night to approve the bill, the CBC reports.

"We've just witnessed a historic vote for Canada. The end of 90 years of prohibition," Sen. Tony Dean, one of the bill's sponsors, told the CBC. "Transformative social policy, I think. A brave move on the part of the government."

Canada's minister of justice sponsored the cannabis bill; the government announced its push for legalization last spring with an official news release that stated, "The current approach to cannabis does not work."

The government said that making marijuana illegal "has allowed criminals and organized crime to profit, while failing to keep cannabis out of the hands of Canadian youth."

It added, "In many cases, it is easier for our kids to buy cannabis than cigarettes."

Those points were echoed by Liberal Prime Minister Justin Trudeau last fall, when he welcomed the news that the bill was making its way to the Senate.

The proposed law would make it legal for anyone over the age of 18 to possess marijuana, provided that it is less than 30 grams (just over an ounce). It also allows Canadians to grow up to four marijuana plants in their home.

The bill's authors write that legalization would have several benefits, from protecting the health of young people (by restricting access) to undercutting criminal enterprises and reducing the workload of the criminal justice system. It would also allow for quality control and public health awareness campaigns.

But critics of the bill say that part of the reason they want to keep marijuana illegal is that they're not convinced that the government will be able to disrupt the marijuana black market to any substantial degree.

That was one point raised by Conservative Sen. Percy Mockler, who said on Monday that "the initiative suffers from a serious absence of policy analysis."

During the debate, Sen. Peter Harder, the government representative in the Senate, said:

"Passing this bill will mean the end of an historic era of prohibition that has punished Canadians with a criminal sanction for what is essentially a health decision. Over the years, how many Canadians have needlessly been given the social stigma and employment barrier of a criminal conviction?"

Canada's government has also published the results of a cannabis survey, based on more than 9,000 responses from people across the country, ages 16 and up.

In the survey, "About half of all respondents indicated that cannabis had a positive effect on a person's mood (51 percent), creativity (45 percent), anxiety (50 percent), and sleep (49 percent)," Canada's Health Ministry said.

The government also said "77 percent of all survey respondents thought that using cannabis could be habit forming."

Medical marijuana has been legal in Canada since the early 2000s. If it legalizes recreational use now, it would give America's northern neighbor another competitive edge in what is widely seen as an emerging and lucrative industry.

"You've got big American alcohol and tobacco companies making investments in Canadian pot firms, because they see an opening," as Peter O'Dowdreported for NPR's Here & Now last month.

One expert told O'Dowd that because of America's more restrictive laws, "We are literally giving the next multibillion-dollar industry ... to the Canadians."

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