Turnbull says Shorten’s ‘heroic’ climate target aimed at making political point

Prime minister derides Labor's pledge to cut 2005 carbon emissions by 45% by 2030 as unrealistic and 'a political rather than an environmental statement'

Related: Bill Shorten lays out bold climate aims as Malcolm Turnbull heads to Paris

Labor's target on climate change is "heroic" and aimed at making a political point rather than helping the environment, the prime minister, Malcolm Turnbull, said.