Reuters: In a rebuff to the Canadian government’s plan to fight climate change, the country’s two biggest provinces agreed in principle on Monday to set up a market-based system to curb greenhouse gas emissions. The premiers of Ontario and Quebec, which between them account for almost two-thirds of Canada’s 33 million population, said Ottawa’s program to cut emissions 20 percent from 2006 levels by 2020 was inadequate and misguided. The two signed a memorandum of understanding to …