Lloyd Griffith has been trucking for 53 years. But he fears that may be coming to an end.

"There's nothing left in it for the trucker," he says.

Griffith is one of many truckers concerned a possible carbon tax being introduced by the Ontario government. The 74-year-old owns a fleet of 15 dump trucks. He says the industry has faced an uptick in licensing fees, a new tax on tires and now the proposed carbon tax.

"If it comes to the carbon tax, we're screwed," he says.

"A lot of the time we're burning 400, 450 litres (of fuel) a day."

There's speculation that the tax would add seven cents onto every litre of gas and fuel. According to Greater Ottawa Truckers Association, a dump truck uses about 27,000 litres of fuel a year. That would mean an additional $1900 a year in fuel costs.

"We've had to consume all these increases to the point there's very little left," says Ron Barr, CEO of the Greater Ottawa Truckers Association.

"A lot of guys are in peril and a lot of guys are on the brink of going broke."

2017 is likely the earliest a carbon tax could come into effect. More details about the provincial government's plan are expected in the new year.

This comes as the UN climate change summit is about to get underway in Paris. Thousands of protesters are expected to hit the streets of the capital on Sunday. Their message is that Canada can be 100 per cent clean and renewable by 2050.

Ottawa police are warning of road closures:

-Laurier Ave. W. between Elgin St. and Nicholas St. will be closed between 10:00 am and 2:30 pm

-Wellington St. between Elgin St. and Kent St. will be closed between 2:30 pm and 4:30 pm.

Other rolling closures will be in place during the protest for the safety of both participants and motorists.