Persuading national government

Today eminent climate scientists have told an Australian parliamentary inquiry that the Prime Minister Kevin Rudd's targets to cut greenhouse gas emissions will not achieve even a "limited" level of protection against climate change and are "much weaker" than the cuts developed countries need to make.
http://www.smh.com.au/environment/global-warming/scientists-on-attack-ov...
They say, "the Australian targets will not achieve climate protection. Even if every nation on Earth adopts and succeeds in meeting Australian targets, global emissions would still be above a pathway consistent with long-term climate protection. The benchmark for avoiding a big risk of climate change is keeping the global temperature from rising more than 2 degrees, they say. And even the most ambitious aim of the United Nations climate talks has only a limited chance of avoiding dangerous climate change. That aim is to keep global greenhouse gas concentrations from rising above 450 parts per million, which they say gives only a 50 per cent chance of protection."