Singer Neil Young is in Calgary for his final performance in his Honor the Treaties tour.  The series of concerts is raising money for opponents of Alberta's oilsands.

Young's Calgary concert is scheduled for Sunday at the Jack Singer Concert Hall.

The Canadian singer declined an invitation to a meeting proposed by the Canadian Association of Petroleum Producers - it had wanted what it called a "balanced discussion".

 In return, Young inivited CAPP representatives to join him at his scheduled news conference in Calgary, but CAPP in a statement said "Young's representative suggested oilsands producers participate in Neil Young's media conference today, but when CAPP requested a neutral moderator and equal representation, the organizer said this was not acceptable" .

Young garnered considerable publicity with his first three concerts, in Toronto, Winnipeg and Regina.

He also generated considerable debate.

Young stuck by statements that the oilsands mining projects near Fort McMurray resemble the devastation wrought by the atomic bomb in Hiroshima in 1945.

He also claimed during the past week that bitumen transported on the proposed Keystone XL pipeline from Alberta to Texas would end up in China.

Young's Hiroshima claim prompted some Twitter users in the Fort McMurray area to post pictures of natural scenes of rivers, lakes and forests under the hashtag #myhiroshima.

Many of the photos are accompanied by comments such as, "The 'wasteland' behind my house," or, "Dog sledding through nuclear wasteland," and are clearly meant to highlight the discrepancy between the rock star's portrayal of their home and what they say is the reality outside their doors.

"I just turned your CDs into landfill. So disappointed," tweeted Terri Windover to Young's official Twitter account.

Catherine Swift, head of the Canadian Federation of Independent Business, posted in #myhiroshima that Young was the "Jenny McCarthy" of the "anti-economic success anti-well-paying jobs movement."

McCarthy, a former model/actress, vehemently claims childhood vaccinations cause autism and other disabilities, despite those claims having been disproven by rigorous scientific research.

"Keep on rockin in the dumb world," Swift tweeted.

TransCanada (TSX:TRP), the company proposing to build the Keystone XL pipeline, has countered that the pipeline would be a conduit for U.S. refineries.

Jim Cuddy from the Canadian band Blue Rodeo called Young's comparison of the oilsands with Hiroshima extreme.

Still, Cuddy suggested that Young has triggered a national discussion about the oilsands that is long overdue.

Young remained unbowed throughout the week, and warned on Thursday that Alberta could end up looking "like the moon" if land isn't preserved.

"It is like a war zone, a disaster area from war, what's happened up there," Young told a news conference ahead of his Winnipeg concert.