BANFF -- The politics of pollution was the theme on the slopes at Sunshine Village yesterday.

Alec Baldwin, Justin Trudeau and Jason Priestley were just a few of the celebrities who participated in the Fairmont Banff Springs Celebrity Sports Invitational for the Robert Kennedy Jr. Waterkeeper Alliance this weekend at Sunshine Village.

The stars are in Banff to help raise awareness about water conservation in North America and they were eager to share their thoughts on Canada's environmental policies.

Baldwin, a long time supporter of Waterkeeper, said Canadians should start thinking about long-term water conservation methods now.

"You (Canada) have so much of what people want here ... Don't do what other people have done, don't do what the U.S. did, which is to put off until tomorrow what should be done today -- protect the resources," said Baldwin, who is known for his active interest in politics.

"We are approaching a time when water will be traded as a commodity in this world."

About 50 Hollywood celebs are in Alberta this weekend, hitting the Rocky Mountain ski slopes, tobogganing, skiing and participating in other organized snow games.

Canadian politico Justin Trudeau was also on hand with mom Margaret Trudeau.

Before the mother-son team hit the snow shoe relay race, Trudeau told reporters it's time Canadians started paying attention to "looming water shortage problems."

"We sit back and say oh, we have lots of fresh water here -- that kind of thinking has got us into trouble, right here in Alberta where there are severe water shortages looming on the horizon as we speak," said Trudeau.

"I think the (federal) conservative government is beholden to interests that make it impossible for them to care properly about the environment."

Model Christie Brinkley, Daryl Hannah, Kelsey Grammer, Tim Robbins and his wife Susan Sarandon are also expected in Banff this weekend.

Canadian Jason Priestley, of 90210 fame, said the issues surrounding water conservation are particularly dear to him.

"I'm from B.C., so anything I can do to take care of the waterways and the salmon habitat is important to me," said the actor, movie-maker, and winery owner.

This is the eighth year in a row the Waterkeeper event has been hosted in Banff.

The stars hit the hill at Sunshine Village yesterday and today to toboggan, biathlon, and dual giant slalom races.

Last year, the Waterkeeper event raised more than $1 million, with tickets for tonight's gala selling for $500 for the public and $10,000 for a gold table.