NSW is preparing a new ambitious emissions reduction target to address climate change and will commit to lowering greenhouse gases by 35 per cent by 2030.

The Sydney Morning Herald has been told Environment Minister Matt Kean will commit to the new target, signed off by state cabinet, which will bolster NSW's previous target of zero emissions by 2050.

NSW Environment Minister Matt Kean will introduce ambitious new emissions targets after saying no one can deny the link between fires and climate change. Credit:James Brickwood, Renee Nowytarger

Mr Kean foreshadowed his plans after he broke ranks with his Liberal Party colleagues on Tuesday and said "no one can deny" climate change is to blame for the smoke haze from the bushfires.

He said NSW needed to act urgently as the state faced a long summer of bushfires and smoke.