A looming financial issue is being highlighted as the country works towards its next emissions budget.

The Climate Commission is recommending greenhouse gas is limited by 134-million tonnes between 2036 and 2040. 

But Victoria University Adjunct Professor Adrian Macey told Mike Hosking that there's still a massive issue if we are going to meet our Paris pledge.  

He says a government between now and 2030 is going to have to find about $20-25 billion to buy carbon credits. 

Macey doesn't see any government being able to feasibly do this. 

LISTEN ABOVE