ggr technologies
current greenhouse gas removal technologies
Removal is achieved through a wide variety of approaches, involving either biology, accelerating natural inorganic reactions with rocks, or engineered chemical processes.
While some GGR methods are already operating somewhere in the world, others require significant development and demonstration before they can remove emissions at scale.
GGR methods also require resources, like land, energy or water, placing limits on the scale and location of their application, and leading to resource competition between them and with other human activities, such as food production.
Greenhouse Gas Removal (GGR) technologies which recapture already emitted greenhouse gases from the atmosphere and ocean, can play a significant role in achieving net zero.
Current examples on GGR technologies include Climeworks, Carbon Engineering, Drax and Project Vesta.
Carbon Cure and Charm Industrial are also examples of carbon storage technologies.
While some GGR methods are already operating somewhere in the world, others require significant development and demonstration before they can remove emissions at scale.
Types of greenhouse gas removal
Forestry
Growing new trees and improving the management of existing forests. As forests grow they absorb CO2 from the atmosphere and store it in living biomass, dead organic matter and soils.
Habitat Restoration
Restoring peatlands and coastal wetlands to increase their ability to store carbon. This also prevents carbon release through further degradation, often providing a number of other co-benefits.
Ocean fertilisation
Applying nutrients to the ocean to increase photosynthesis and remove atmospheric CO2.
Ocean alkalinity
Increasing ocean concentration of ions like calcium to increase uptake of CO2 into the ocean, and reverse acidification.
Enhanced terrestrial weathering
Spreading ground-down rocks on agricultural land, which react with CO2 in the air.
Biochar
Burning biomass in the absence of oxygen (pyrolysis) to create a charcoal-like product which can stabilise organic matter when added to the soil.
Soil carbon sequestration
Changing agricultural practices such as tillage or crop rotations to increase the soil carbon content.
Bioenergy with carbon capture and storage (BECCS)
Using biomass for energy, capturing the CO2 emissions and storing them to provide lifecycle GGR.
Direct air capture and carbon storage (DACCS)
Using engineered processes to capture atmospheric CO2 for subsequent geological storage.
Low-carbon concrete
Altering the constituents, the manufacture, or the recycling method of concrete to increase its storage of CO2
Building with biomass
Using forestry materials in buildings extends the time of carbon storage of natural biomass and enables additional forestry growth.
Mineral carbonation
Accelerating the conversion of silicate rocks to carbonates either above or below the surface to provide permanent storage for CO2.
greenhouse gas removal case studies
carbon engineering
Carbon Engineering uses Direct Air Capture (DAC) technology to capture carbon dioxide directly from the atmosphere.
Climeworks
Climeworks develops, builds and operates direct air capture machines to capture carbon dioxide directly from the air.
News and Events
Job opening – Data Lead: Net Zero Tracker
This is an exciting opportunity to be at the heart of the project providing crucial data for assessing net zero commitments around the world – https://www.zerotracker.net. The Net Zero Tracker is built on the dedicated and organised effort of ... Read more
Findings from Scope 3 workshops hosted by Oxford Net Zero and Grantham Institute at Imperial College London published
The Science Based Targets Initiative (SBTi) is the largest validator of corporate net-zero targets, representing nearly 40% of the global economy by market capitalisation, through assessment against its Corporate Net Zero Standard. In April ... Read more
Job openings: three new post-doc roles researching net zero aviation (now closed)
The School of Geography and the Environment and the Department of Earth Sciences are recruiting three Post-doctoral Research Associates (PDRAs) to form a cohort of researchers working on net zero aviation. The roles are: Post-Doctoral ... Read more
Oxford Net Zero report assesses the voluntary standards landscape
Oxford Net Zero’s Engagement Team have released a new report today, comprehensively assessing guidance for net zero across 37 different guidance documents, disclosure instruments and assessment frameworks. The team developed more than sixty ... Read more
Job Opening at ONZ: Youth Climate Training Assistant
The Oxford Net Zero Engagement Team (based at the Smith School of Enterprise and the Environment) is looking for a motivated individual to support the team 8 hours a week for 12 weeks (96 hours in total) in the second delivery of the Youth ... Read more
Onshore geological carbon storage has potential in the UK, but key knowledge and regulatory gaps remain – ONZ report
A new report by a team of Oxford Net Zero researchers reviews the current state of knowledge on onshore geological carbon storage (GCS) and its feasibility in the UK. Read more
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