BBC: CO2 is not the only harmful emission from cars The Swedish carmaker Volvo has called for greater openness about all harmful emissions from cars. Currently, consumers are told how much carbon dioxide CO2 a car emits. But Volvo’s UK’s managing director Peter Rask told BBC News that buyers should also be told about the level of nitrogen oxide (Nox) and hydrocarbons vehicles churn out. “We think it is time to give consumers information about all emissions,” he …