On the eve of global climate talks that will put Canada's contentious policies under the microscope, Ottawa has introduced its next set of rules to cut greenhouse gas emissions from cars and light trucks.

Under regulations proposed on Tuesday, vehicles built between 2017 and 2025 will be required to cut emissions by an average of five per cent a year, every year.

Environment Minister Peter Kent said these rules should cut average gasoline costs by about $900 per auto.

The regulations are designed to match U.S. standards first proposed more than a year ago and will build on existing regulations that cover models built between 2011 and 2016.

"We will see emissions at 50 per cent of what they were in 2008," Kent said in an interview.

Light trucks won't have to meet the new standards as quickly as cars because manufacturers need extra time to make sure they can perform the work required by the farmers and construction workers who drive them, Environment Canada said in a background document.

Manufacturers call regulations 'challenging'

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Environment Minister Peter Kent visited an Ottawa car dealership Tuesday to announce proposed regulations to improve fuel efficiency and reduce greenhouse gas emissions in passenger vehicles and light trucks for model years 2017 to 2025. (Sean Kilpatrick/Canadian Press)

The group that represents car manufacturers in Canada is supporting the new regulations but calls them "aggressive and complex," reports the CBC's Margo McDiarmid.

Mark Nantais, the head of the Canadian Vehicle Manufacturers' Association, says the advantage of the regulations is they are harmonized with the large U.S. car industry. allowing companies to spread the increased costs over a larger consumer population.

But Nantais says there's no doubt implementing these increased fuel standards will be very challenging for an industry that's still figuring how it will meet them.

"To be honest, getting out into 2025, we've never reached so far into the future in terms of what's going to be necessary technology-wise to meet these very stringent standards," he told reporters Tuesday. "The industry is going to be challenged ... no one thinks it's going to be a cakewalk."

Nantais predicts the new standards will add at least $700 to the cost of a new car and probably more for larger vehicles.

"You will see a range of costs depending on how these vehicles evolve."

Kent faces rough ride at Doha talks

The announcement comes more than a year after the United States announced a similar plan, but the timing is no accident. Kent leaves this weekend for a week of climate change talks in Doha that, as usual, will put him on the defensive.

"We wanted to make the announcement before Doha because it is another step forward in our sector-by-sector approach," he said.

While the Harper government has been vociferous in its attack against other approaches to controlling emissions, Canada's policy of regulating industry by industry has drawn scorn not just from environmentalists but also other countries.

In Canada, the federal environmental commissioner and the now defunct National Roundtable on the Environment and the Economy have both said this approach is not enough to meet the country's 2020 emissions target.

Environmental organizations say Canada lacks credibility at the bargaining table as countries seek to replace the expiring Kyoto protocol with another binding international treaty to limit global warming.

But Kent said he will tackle his critics head-on in Doha.

"There's an awful lot of misinformation out there and no little amount of disinformation about Canada's commitment towards climate change, both in terms of mitigation and adaptation," he said. "We'll be meeting with the media, we'll be meeting with our colleagues in the major economies' forum, to talk about the things we are doing.

"We'll refresh the memory of folks who don't know or who don't want to know that our sector-by-sector approach has taken us halfway to our 2020 targets."

But Kent will not be taking any promises of money to the United Nations talks in Doha.

The top UN climate official as well as many environmental groups are pleading with developed countries to live up to a commitment to help poor countries deal with and prevent more climate change.

Time has run out for a $30-billion, three-year global fund that was meant to kick-start a larger $100-billion-a-year fund partly financed by the private sector. But the larger fund is still empty.

No one should expect the Doha talks to change that, Kent said.

"This isn't a pledging conference," he said, adding that he will make that clear at the meetings.

With files from the CBC's Margo McDiarmid