Business Green: Urgent scientific investigation of the impact of a range of non-C02 pollutants is needed ahead of the climate convention in Copenhagen if real and meaningful action is to be taken against global warming, according to the UN. Speaking at the World Climate Conference in Geneva late last week, Achim Steiner, executive director of the UN Environment programme, said the contribution of non-CO2 pollutants needs to ascertained to make sure that the decisions taken in Copenhagen in December …