Canada is one of the world's top oil producers and one of the highest emitters of greenhouse gases on a per capita basis. Members from its main opposition Conservative Party have voted down a proposal to recognise the climate crisis as real. On Saturday, Conservative delegates voted against making highly polluting businesses take more responsibility to reduce greenhouse gas emissions. This vote came after the Conservative leader, Erin O'Toole told party members he did not want Conservative candidates to be branded as "climate change deniers". Canada correspondent Laura McQuillan spoke to Guyon Espiner.