IPCC Expert Meeting on Geoengineering

Annex 5: Breakout Group Reports
Can the most important aspects of these issues be supported by reference to the peer-reviewed literature?
The group discussed whether relevant criteria can be assessed using the available peer-reviewed literature (Y/N). The
judgment is subjective rather than based on the number of publications in the peer-reviewed literature, also recognizing
that publication activity is not necessarily an indicator of the ability to draw conclusion.
Table A.5.1: Criteria for Carbon Dioxide Removal Approaches
Weathering
(land and
ocean)
Ocean
fertilization,
biological
Afforestation/
reforestation
No-tillage Biochar Direct
capture
Feasibili ty Y Y Y Y Y Y
Effecti veness N Y Y Y Y Y
Si de effects N N Y Y N Y
Effi ci ency N N Y Y N Y
Soci al /l egal N
N
Y Y Y Y
acceptability
(Y for legal)
Regulation N N Y Y N N
Monitoring & N N Y Y Y Y
Verification
Ethi cs N N Y Y N N
<strong>IPCC</strong> <strong>Expert</strong> <strong>Meeting</strong> on Geoengineering - 77