Carbon dioxide has been pumped underground and turned rapidly into stone, demonstrating a radical new way to tackle climate change.
The unique project promises a cheaper and more secure way of burying CO2 from fossil fuel burning underground, where it cannot warm the planet. Such carbon capture and storage (CCS) is thought to be essential to halting global warming, but existing projects store the CO2 as a gas and concerns about costs and potential leakage have halted some plans.
The new research pumped CO2 into the volcanic rock under Iceland and sped up a natural process where the basalts react with the gas to form carbonate minerals, which make up limestone. The researchers were amazed by how fast all the gas turned into a solid – just two years, compared to the hundreds or thousands of years that had been predicted.
“We need to deal with rising carbon emissions and this is the ultimate permanent storage – turn them back to stone,” said Juerg Matter, at the University of Southampton in the UK, who led the research published on Thursday in the journal Science.
Matter said the only thing holding back CCS was the lack of action from politicians, such as putting a price on carbon emissions: “The engineering and technology of CCS is ready to be deployed. So why do we not see hundreds of these projects? There is no incentive to do it.”
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I found this documentary really excellent. Its definitely worth watching the full thing but I found it particularly fascinating (at 20min, 24seconds) when the lady speaks about her farm having 20 different species of grass on her pastures. She goes on to explain how this enables her to have a constant ground cover all year round and due to how dense the roots are it holds and binds the soil together preventing the hooves tearing it up. Really quite amazing information on how biodiversity of grass species is the key to farming cattle year on year without the ground being damaged by the animals them selves, lets the farm continue on without being affected by things such as global oil prices too.
“Wildlife film maker Rebecca Hosking investigates how to transform her family’s farm in Devon into a low energy farm for the future, and discovers that nature holds the key.
With her father close to retirement, Rebecca returns to her family’s wildlife-friendly farm in Devon, to become the next generation to farm the land. But last year’s high fuel prices were a wake-up call for Rebecca. Realising that all food production in the UK is completely dependent on abundant cheap fossil fuel, particularly oil, she sets out to discover just how secure this oil supply is.+
Alarmed by the answers, she explores ways of farming without using fossil fuel. With the help of pioneering farmers and growers, Rebecca learns that it is actually nature that holds the key to farming in a low-energy future.
This documentary was first shown in 2009 on BBC2 as part of the Natural World series.”