Former Green leader running for PQ

The former leader of Quebec's Green Party has switched allegiances and is running for the Parti Québécois.

Scott McKay has announced he'll carry the PQ banner during his campaign in the riding of l'Assomption, in Montreal North. 

McKay — an environmentalist and water specialist — said he grew disillusioned with the Greens after losing the leadership race last March. 

"I started thinking that if I do want to pursue my combat for the environment inside the National Assembly, I needed to join a larger party," he told CBC News Thursday. 

The PQ held the riding from 1989 on, but lost it to the ADQ in the last election.

The Quebec Greens won 4.39 per cent of the popular vote in the 2007 election.