Global CO2 storage capacity may be drastically overstated, study finds

Mongabay
Mongabay
3M ago
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A new study reveals that the global capacity for carbon dioxide storage may be significantly lower than previously estimated, raising concerns about carbon capture and storage (CCS) effectiveness.
Global CO2 storage capacity may be drastically overstated, study finds
A What happened
A study published in Nature has found that the global capacity for carbon dioxide (CO2) storage may be drastically overstated, with only about 1,460 gigatons of CO2 deemed safe for underground storage. This contrasts sharply with previous estimates suggesting a capacity of up to 55,000 gigatons. The research highlights significant risks associated with carbon capture and storage (CCS), including potential water contamination and seismic activity. The authors argue that CCS should be reserved for carbon-intensive sectors where alternatives are limited, such as agriculture. They stress the importance of treating CCS as a finite resource and advocate for enhancing natural carbon sinks through reforestation and conservation. The study underscores the urgency of addressing climate change, as current projections indicate a potential rise in global temperatures that exceeds the targets set by the Paris Agreement.
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Key insights

  • 1

    Limited CCS Capacity: The study reveals that safe CO2 storage capacity is significantly lower than previously thought.

  • 2

    Risks of CCS: Potential risks include water contamination and earthquakes, limiting viable storage sites.

  • 3

    Need for Alternative Solutions: Emphasizes the importance of reducing carbon emissions through reforestation and conservation.

  • 4

    Urgency in Climate Action: Immediate action is necessary to meet climate goals and mitigate global warming.

Takeaways

The findings highlight the need for a multifaceted approach to combat climate change, beyond reliance on carbon capture and storage.

Topics

Climate & Environment Climate Change Conservation