Prime Minister Justin Trudeau made a forceful argument in favour of pipelines and the Alberta oil sands Thursday, one day before he will sign on to an international climate change agreement that Canada鈥檚 budget watchdog says can only be achieved with a substantial hit to incomes.

Assistant Parliamentary Budget Officer Mostafa Askari told CTV鈥檚 Power Play that their study, released Thursday, found that the level of carbon pricing required to meet the emissions reduction target Canada agreed to in Paris last fall -- 30 per cent below 2005 levels by 2030 -- would reduce GDP by one to three per cent per year.

That would translate to an average hit to annual incomes of $600 to $1,800 per person.

鈥淭hat doesn鈥檛 mean peoples鈥 incomes (are) going to go down,鈥 Askari said. 鈥淚t just means it will be lower than it would have been without these taxes.鈥

Askari said the goal is ambitious, but can be achieved through a combination of measures such as taxes, tougher regulations, environmental subsidies, cap-and-trade, and a gasoline tax hike of about 24 cents per litre.

includes various scenarios, but suggests measures would need to equate to carbon taxes of about $100 per tonne of C02, or significantly less if carbon capture and storage technology is used.

For comparison purposes, British Columbia鈥檚 current carbon tax is $30 per tonne and Alberta鈥檚 will only hit that level starting in 2018.

Askari said the emissions target could end up costing less, however, if technology improves faster than expected -- as was the case with acid rain mitigation.

Trudeau defends pipelines

Ahead of his visit to the United Nations Friday, where he will sign the COP21 agreement, Trudeau faced questions from New York University students, including one about why Canada is 鈥渟till putting money into dirty oil sands.鈥

The prime minister responded with a forceful argument in favour of continuing to develop the Alberta oil sands and build pipelines while moving towards a low-emissions economy.

鈥淭he previous government didn鈥檛 do a very good job of being concerned about the environment at all,鈥 he said. 鈥淎nd because of that, a shortcut to being concerned about climate change and wanting action was to demonize the energy resources in western Canada,鈥 he said. 鈥淭hey were an easy scapegoat.鈥

鈥淚t鈥檚 easy to say: 鈥榊ou want to save the planet? Just block those pipelines鈥,鈥 he added. 鈥淲e know that鈥檚 a simplistic solution.鈥

Trudeau told the students he made a similar argument a few years ago, when he tried to convince Democratic lawmakers in Washington to support the Keystone XL pipeline that President Barack Obama later quashed.

The prime minister said that if everyone was forced to 鈥渓eave our car at home鈥 and 鈥渟top using fossil fuels tomorrow,鈥 then the 鈥渨orld would come to a crashing halt.鈥

"Do I agree that in the future we're going to have to get off fossil fuels?鈥 Trudeau said. "Absolutely.鈥

鈥淚s that future tomorrow?鈥 he added. 鈥淣o, it's not.鈥

Trudeau suggested the solutions to climate change involve 鈥渆ducation, innovation, science, efficiencies, changing behaviours, changing the ways our cities work, investing in public transit (and) research.鈥

鈥淲e're very much better off doing that from a position of having a capacity to invest and research,鈥 he added, 鈥渢han doing it by firelight in a cave 100 years from now, when we've reached a collapse because we haven鈥檛 engaged with it.鈥

鈥楧鈥 from Conference Board

Trudeau also faces a that ranks the country 14th out of 16 peer nations on environmental performance. Only the U.S. and Australia are ranked worse.

Canada's greenhouse gas emissions are among the highest, in part because of our cold climate, the study found.

Canada did, however, receive an "A" rating for low-emitting electricity generation. The report points out that nearly 80 per cent of Canada's electricity is generated from sources such as hydro and nuclear power.

鈥淭hese results show that Canada needs to encourage more sustainable consumption,鈥 said Conference Board vice-president Louis Theriault. 鈥淧rotecting the environment from damage is not a problem for tomorrow but a challenge for today.鈥

With files from The Canadian Press