Australian: CLIMATE Change Minister Greg Combet has ramped up pressure on Tony Abbott to take part in the climate change committee negotiated with the Greens. Mr Combet today made a “national interest’ appeal to the Coalition to take a more constructive approach to climate change, saying the Opposition Leader had his “head in the sand’ and was trying to wreck the new parliament. The attack follows the release of the Treasury brief for an incoming government on Friday which warned that …