RIO DE JANEIRO — Prime Minister Justin Trudeau is defending his embattled carbon-pricing program on the world stage, and he argues that misinformation is threatening environmental progress. Trudeau arrived today in Brazil for the G20 leaders summit, and addressed a conference held by the anti-poverty group Global Citizen. He touted Canada’s consumer carbon levy, arguing it is among the world’s strongest but “an easy political target” in Canada. Trudeau acknowledged pushback to the policy, but he said it is being fuelled by what he called propaganda and misinformation that affordability is in contrast with fighting climate change. …Conservative Leader Pierre Poilievre has vowed to cancel the policy, pushing for a “carbon-tax election” to bring down the cost of living.