Billions of tonnes of additional carbon will enter the air at a site next to “unique environmental assets of global significance” under the 50-year extension.
The West Australian government has pledged to cut its emissions by 80 per cent by 2030 while announcing details for the state's third desalination plant.
The WA government wants to reverse a decline in native vegetation, but stakeholders are unsure how the state will get there despite a new policy promising a net gain.