NSW is failing to reduce carbon emissions fast enough to meet rapidly looming targets, a new scorecard has revealed.

Without change, the state is unlikely to meet its legislated reduction targets of 50 per cent by 2030 and 70 per cent by 2035, a report by the Net Zero Commission revealed on Thursday.

If it is to meet the 2030 target, the state needs to cut emissions 2.5 times faster than the average rate since 2005.

Much of the technology and approaches needed to get the state back on track are already available across electricity, transport, industry and buildings.

However, government decision making – including on proposed coal mine extensions – was not consistent enough with the targets, the commission said.