Toronto Star: To many, climate change is the gravest crisis facing the planet. But convincing Ontario residents to pay more to reduce greenhouse gas emissions may be the most daunting communications and marketing challenge the provincial government has ever tackled. Premier Kathleen Wynnes cap-and-trade system puts a price on carbon, making gasoline, natural gas and other fossil fuels more expensive. The first polling on the scheme unveiled in the Feb. 25 budget suggests Ontarians are skeptical about paying...