A SENIOR CSIRO environmental economist has gone public to accuse the science body of trying to gag his report attacking the Federal Government's climate change policies. The paper, by Clive Spash, criticises the Carbon Pollution Reduction Scheme and argues that direct legislation or a tax on carbon is needed... Dr. Spash also wrote that the economic theory underpinning emissions trading schemes was far removed from the reality ... He said trading schemes were ineffective ... He claims the CSIRO had tried to block the publication of the report, despite it being internationally peer reviewed and accepted by the journal New...