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Capturing carbon
In its landmark report in October, the UN's International Panel on Climate Change said that every package of measures we choose to limit global temperature rises to 1.5°C must include a way of removing carbon dioxide emissions from the air and reusing or storing them. This month, Horizon looks at what's being done to advance these carbon capture, storage and utilisation technologies. We talk to one expert who is trying to trap emissions from the cement industry before they are released, and find out how International Space Station technology is inspiring the capture of ambient carbon dioxide. We also investigate how captured CO2 can be reused, and examine just how safe it is to store the gas underground.
Scientists at Hellisheidi geothermal power plant in Iceland have demonstrated a carbon capture and storage cycle at half the cost of previous estimates. Image Credit: Arni Saeberg, CarbFix
Environment, Energy, Industry
Storing CO2 underground can curb carbon emissions, but is it safe?

At first glance, it almost sounds crazy. Can we really take carbon dioxide emissions from an industrial plant and store them underground? To find out, research is currently taking place to test if such an idea is not only viable but safe, and prove that to the public.

The CRI plant sells around 4,000 tonnes of methanol produced from waste CO2 per year. Image Credit - Carbon Recycling International
Environment, Industry
Waste CO2 to be turned into ingredients for fuel, plastics and even food

Scientists are ramping up efforts to turn waste CO2 from industry into chemicals such as methanol in a bid to reduce emissions and provide a new source of raw materials for use in fuel, cement and food production.

The International Space Station air filter which expels CO2 has inspired scientists to try to create an Earth-based version. Image credit - NASA/Mark Garcia
Environment, Industry
System to rid space station of astronaut exhalations inspires Earth-based CO2 removal

When astronauts aboard the International Space Station (ISS) exhale carbon dioxide (CO2), it’s removed from the air and pumped into space. Could an Earth-based version help remove greenhouse gas emissions from our atmosphere?

Through a project called CEMCAP, Kristin Jordal and her colleagues found that when it comes to cement production, 90% carbon capture is a realistic target. Image credit - Kristin Jordal
Interview, Environment
To slash emissions, industries must capture carbon and store it

The technology to help limit global warming to 1.5˚C already exists, but there needs to be the will to use it, according to Kristin Jordal, an engineer and senior research scientist at the Norwegian research organisation Sintef.

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