Carbon dioxide emissions rose strongly last year after several years of a near plateau. It appears that the main factor was increased use of oil, mainly as motor fuel. I’ll try to do a more detailed analysis later, but the central element of the required response is obvious. Just like coal-fired power stations, petrol-driven motor cars need to be phased out, as quickly as possible. Australia, as an oil importer with no domestic car production is in a position to pursue this target aggressively. We should, as others have done, commit to a date, say 2030, after which all new cars sold would be zero emission.