IPCC Expert Meeting on Geoengineering

Annex 5: Breakout Group Reports
Transboundary processes?
Emissions reductions versus sink creation?
Size of sink?
Biological, physical, chemical?
Local benefit as additional driver or control? (e.g., soil fertility in case of conservation agriculture, tillage, or
biochar; or local energy needs in case of bioenergy in combination with Carbon Capture and Storage (CCS))
The group proposed a range of approaches without making a priority list:
Afforestation/reforestation
Improved forest management
Sequestration in buildings
Biomass burial
No till agriculture
Biochar
Conservation agriculture
Fertilization of land plants
Creation of wetlands
Bioenergy with CCS
Ocean storage (biological, chemical, physical):
Fertilization
Algae farming and burial
Blue carbon (mangrove, kelp farming)
Modifying ocean upwelling
Direct CO 2 injection
Weathering
Ocean pipes
Carbon absorbing cement
Direct air capture of CO 2
Figure A.5.1 provides an example for applying the organizing principles discussed above to more appropriately shape the
discussion about CDR:
<strong>IPCC</strong> <strong>Expert</strong> <strong>Meeting</strong> on Geoengineering - 75