Geoengineering for climate change

DANIEL BODANSKY of the Arizona State University states that geoengineering, a concept encompassing a variety of approaches to counteract the effects of greenhouse gas emissions, covering Solar radiation management (limiting sunlight reaching the earth, through such diverse techniques such as cloud whitening, stratospheric aerosol injection or space-based mirrors) and Carbon dioxide removal  (through enhanced weathering of rocks, mechanical trees, ocean fertilization) could increasingly become more salient if efforts to negotiate a new international agreement take too long to succeed. He states that unless the Kyoto Protocol could either be dramatically increased in scope or replaced by a new, more comprehensive agreement, global emissions will continue to rise and based on the current emissions trajectories, CO2 emissions could triple or quadruple by end of the century rather than double as has been currently estimated, potentially resulting in far more disastrous, non-linear effects of climate change.
In his discussion paper for the Harvard project on climate agreements, "Governing Climate Engineering: Scenarios for Analysis", he states that this has resulted in increasing interest in geoengineering solutions to address climate change and explores the various options currently available as well as costs and benefits of each approach. He highlights the lack of an international governance framework covering geoengineering activities including tasks such as developing norms to guide scientific research, allocating jurisdiction among states to regulate individuals, elaborating rules that constrain state behavior, and establishing procedures to limit conflict among states and predicts that governance of geoengineering was more likely to develop through the extension of existing treaty regimes to cover various types of geoengineering than through the development of a single comprehensive regime.