What is Carbon Capture and Storage?

20.07.21 By

Carbon capture and storage, or CCS, has been touted as a ‘technology’ that could help lower Australia’s emissions. But does it stack up? Let’s cut through the spin and look at the facts.

Key points:


Carbon capture and storage (CCS) involves capturing, transporting and storing greenhouse gas emissions from fossil fuel power stations, energy intensive industries, and gas fields by injecting the captured greenhouse gases back into the ground. CCS is proposed in a range of different areas, but this fact sheet focuses on the forms of CCS attached to fossil fuel energy infrastructure. Not everything here applies equally to other uses of CCS.

CCS backers claim that it can be used to reduce the impact of emissions-intensive industries like cement, steel and chemical production. However, CCS will never be a ‘zero-emissions’ solution, particularly where it’s attached to highly-polluting coal and gas projects.


Carbon capture and storage in the fossil fuel sector is best described as an expensive failure. After decades of CCS research and billions of dollars invested around the world, including here in Australia, there is little to show for it. In fact, when CCS is attached to coal and gas power stations it is likely to be at least six times more expensive than electricity generated from wind power backed by battery storage. Every CCS project that has been undertaken so far has resulted in significant delays and massive cost blow outs. Even when they get a project up and running, CCS trial sites like Chevron’s Gorgon gas plant continue to belch out huge amounts of pollution.

The final step of CCS is ‘storage’. That is, storing the captured CO2 in a suitable underground location, which is simply unavailable for many facilities where the CO2 is produced.

Over the past decade, wind and solar have become cheaper each year and are now the cheapest type of new energy build. Over the same period, CCS has remained extremely expensive. There is not a single carbon capture and storage project in the world that has delivered on time, on budget, and captured the agreed amount of carbon.

An image of A man with text explaining why CCS is a bad investment and an expensive way to prop up fossil fuels.


Chevron’s Gorgon Gas Plant in Western Australia is the biggest attempted CCS project anywhere in the world, which the Federal Government has highlighted as “a flagship”. Attached to a gas plant plagued by leaks and cracks which is frequently evacuated, the Gorgon CCS trial has been a big, expensive failure. It is capturing less than half the emissions needed to make CCS viable, with the CO2 Injection Project costing an estimated $2 billion.

As of July 2021, Gorgon has reached a milestone with five years of failure, falling millions of tonnes short of its emissions capture promises. If Chevron is required to make good on its failed promises using carbon credits, this will cost the company nearly $100 million.


When attached to fossil fuel developments – like coal, oil and gas – CCS is not a climate solution, as digging up and burning fossil fuels adds to the problem. Global temperatures do not stop increasing until emissions reach net zero. To achieve that we must stop digging up and burning fossil fuels. CCS is extremely expensive and cannot deliver zero emissions. The only solution is to stop burning coal, oil and gas.

When paired with coal and gas, CCS is simply an attempt to prolong the life of polluting fossil fuels in our energy system.


Want to know more about how gas is contributing to climate change? Watch this video!