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britannica.com
article
https://www.britannica.com/science/geoengineering/Carbon-removal-proposals
The carbon-removal approach would extract CO2 from other gases in the atmosphere by changing it into other forms of carbon (such as carbonate) through photosynthesis or artificial “scrubbing.” This separated carbon then would be either sequestered in biomass at the surface or transported away for storage in the ocean or underground. These include carbon burial, ocean fertilization, biochar production, and scrubbing towers or “artificial trees.”. Carbon burial, more commonly known as carbon capture, utilization, and storage (CCUS), involves the pumping of pressurized CO2 into suitable geological structures (that is, with gas-tight upper layers to cap the buried carbon) deep underground or in the deep ocean (*see* carbon sequestration). The carbon-burial process could also make use of carbon dioxide captured from the atmosphere using scrubbers (*see below* Scrubbers and artificial trees). Direct air captureCollector containers for capturing carbon dioxide from the atmosphere at the Orca plant in Hellisheiði, Iceland. Another form of carbon capture, called direct air capture (DAC), would involve the use of scrubbing towers and so-called artificial trees.
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en.wikipedia.org
article
https://en.wikipedia.org/wiki/Geoengineering
Carbon dioxide removal (CDR) is a process in which carbon dioxide (CO 2) is removed from Earth's atmosphere by deliberate human activities and durably
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geoengineering.global
article
https://geoengineering.global/carbon-dioxide-removal/
Carbon Dioxide Removal (CDR) is a geoengineering or climate engineering approach that focuses on removing carbon dioxide from the atmosphere to limit and/or reverse Global Warming and Climate Change. Direct Air Capture approaches remove carbon dioxide directly from the air or atmosphere, compress the CO2 into a liquid, and store the liquid CO2 underground or use the CO2 in carbon-neutral fuels or products. **Biochar** is a solution to Global Warming that removes carbon dioxide from the atmosphere by burying charcoal in the soil. Plants and trees remove carbon dioxide from the atmosphere. **Enhanced Weathering** is a geoengineering carbon dioxide removal approach that utilizes chemical reactions between rocks/minerals and CO2 to reduce CO2 in the atmosphere. When the algae die and their biomass sinks to the bottom of the ocean, the carbon dioxide they absorbed is removed from the atmosphere for extremely long periods of time. Ecosystem Restoration removes carbon dioxide from the atmosphere by storing the carbon in plants and animals.
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climate.earthathome.org
article
https://climate.earthathome.org/wp-content/uploads/2024/04/Chapter-8-Geoengin…
2 These studies include the Royal Society report mentioned in (1) and two reports from the US Na-tional Research Council: Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration (2015), and Climate Intervention: Reflecting Sunlight to Cool Earth (2015), The National Acadamies Press, Washington, D.C. 182 8 Geoengineering Counteracting approached a tipping point—a threshold beyond which the Earth would enter a vastly different climate state—then emergency measures would likely garner more serious attention. 1.1 Types of Climate Intervention Geoengineering methods fall under two classes: 1) Carbon dioxide removal (CDR), which removes CO2 from the atmosphere, and 2) solar radiation management (SRM), which reflects sunlight back into space. Box 8.1: Exercise to examine the mass scales involved in one type of enhanced chemical weathering6 185 Geoengineering 8 CO2 Removal 2.2 Ocean Fertilization Another of Nature’s ways of removing CO2 from the atmosphere is through photosynthesis by phytoplankton at the surface of the ocean (Figure 8.2).
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congress.gov
official
https://www.congress.gov/crs-product/R48258
Some CDR methods increase the uptake of CO2 on land by increasing forested area or increasing carbon sequestered in soils. Other methods have
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cdrlaw.org
article
https://cdrlaw.org/resources/carbon-dioxide-removal-geoengineering/
Carbon dioxide removal (CDR) geoengineering, the proposal to counteract anthropogenic climate change by large-scale removal of carbon dioxide from the atmosphere, is playing an increasingly prominent role in the modeling that informs international climate change policy. The research, testing and development of CDR technologies needed to support these expectations pose significant challenges for international and domestic climate change law. Prominent examples of CDR proposals include bioenergy production with carbon capture and storage (BECCS) and carbon sequestration by ocean fertilization. Despite this, there has been little analysis to date of how Australian law might govern CDR research, testing and development. Using case studies of BECCS and ocean fertilization CDR techniques, this article examines the capacity of current Australian law to govern CDR research. The authors find that general environmental legislation might provide a basic governance framework for research and field-testing of BECCS and ocean fertilization, but recommend that specific laws be developed if CDR is to play a prominent role in meeting Australia’s international climate change commitments.
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ciel.org
article
https://www.ciel.org/why-geoengineering-is-a-false-solution-to-the-climate-cr…
Carbon Dioxide Removal (CDR). CDR techniques theorize removing carbon from the atmosphere on a massive scale. Methods range from sucking carbon
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noaa.gov
official
https://www.noaa.gov/news-release/carbon-dioxide-removal-as-tool-to-mitigate-…
Today, NOAA is releasing a new strategy and inviting the public to join upcoming listening sessions that will guide the agency’s potential role in an important part of understanding and addressing climate change — carbon dioxide removal. NOAA has summarized some of the current science on this topic in a new report, and is asking the public to comment on the agency’s potential future role in carbon dioxide removal research. As a leader in climate research, ocean science and coastal management, NOAA is uniquely suited to provide leadership for a comprehensive assessment of carbon dioxide removal. Instead, NOAA identifies and explains 11 removal strategies, outlines the relative strengths and weaknesses of each technique and describes the agency’s potential research contributions. The public is invited to read the report, review all 11 carbon dioxide removal techniques and strategies, evaluate NOAA’s proposed role in carbon dioxide removal research and provide comments.