Tony Abbott now has 5 days to release his climate change policy.

Today Mr Abbott's shadow minister for climate action, Greg Hunt, offered these guarantees on ABC Radio:

SABRA LANE: Can you guarantee that the scheme you will unveil next week will lower emissions by 5 per cent, and can you guarantee that it will cost less than what the Government's proposing its scheme will cost?

GREG HUNT: Yes and yes.

To meet this guarantee, Mr Abbott will need to release a fully costed and detailed climate change policy that is capable of delivering the full bipartisan target range.

The Government's Carbon Pollution Reduction Scheme is fully costed and works by putting a limit on Australia's carbon pollution and making polluters pay. It is the cheapest and most effective way to reduce carbon pollution and deliver Australia's full emissions reduction target range.

That is why this policy approach has been supported by mainstream conservative leaders such as former Prime Minister John Howard, former Opposition Leader Malcolm Turnbull and former Treasurer Peter Costello, as well as business groups.

Mr Abbott has already made clear that he refuses to make polluters pay.

To fund his policy, Mr Abbott must explain what spending measures he will cut or what the impact will be on debt and deficit.

After two months of talk and spin, it is time for Mr Abbott to put forward his detailed, fully costed climate change policy.