"The report says what the Prime Minister hasn’t said," he said.
"It says that there’s substantial economic potential for the mitigation of global greenhouse gas emissions over the coming decades.
"That’s what the Labor has been saying. That’s not what the Prime Minister has been saying."
Mr Turnbull says Labor’s plan to reduce Australia’s emissions by 60 per cent by 2050 will cost jobs and have little global impact.
"If you put a heavy price on Australia’s energy intensive industries, those industries will move offshore and their emissions with them," he said.
But Mr Garrett says Labor’s plan is a prudent one.
"It says we need to set targets, we need to reduce emissions and we need to get on with it now," he said.
"And we need to do it in a way that actually recognises that we need to build sustainable economic prosperity as we go."