Donald Brian MacIntyre (born 1955) is a former Canadian politician and criminal from Alberta.

[3] On January 2, 2017, MacIntyre — while speaking to the press — asserted that human activity is not the primary cause of climate change.

Leduc-Beaumont NDP MLA Shaye Anderson said, "It’s irresponsible to lend climate change-denying conspiracies the credibility of the office of the Official Opposition.

"[5] The Wildrose Party responded by issuing a statement that, "We get calls daily from Albertans living in NDP-held ridings furious that their MLAs are not listening to their opposition to the carbon tax.

I suggest they spend their time listening to those concerns,"[6] – in reference to the $20 per tonne carbon tax put in place by the Alberta government.