Climate change and geoengineering

Could geo-engineering prevent climate change? James Woudhuysen believes that:

[E]nvironmentalists tend to dismiss geo-engineering because, at root, they are not interested in halting climate change. For many today, both green activists and leading politicians, climate change is a moral and political issue rather than simply a practical problem. They see the ‘issue of climate change’ as a means to changing people’s behaviour and expectations, rather than simply as a byproduct of industrialisation that ought to be tackled by technological know-how. They are resistant to geo-engineering solutions because putting an end to climate change would rob them of their raison d’être.

I really don't know about that, but I do wonder whether there are more efficient or politically realistic ways of preventing climate change than the current approach, which relies exclusively on cutting our greenhouse gas emissions. What's disturbing is not so much why alternative solutions aren't being seriously considered, but simply the fact that they aren't. Probably the answer lies in the nature of the possible side-effects. They might be difficult to anticipate and disastrous. But so too might the effects of climate change or, indeed, those of emission cutbacks.

I see geo-engineering approaches as a subset of a large array of possible (partial) solutions. A Climate Stability Bond regime would encourage people to explore and enlarge this array, and to pursue only the most promising projects. The mix of projects would be diverse and adaptive. Possible negative effects of, for instance, geo-engineering - or, for that matter, cutbacks of greenhouse gas emissions - could be avoided by stipulating that Climate Stability Bonds shall not be redeemed if these effects are too large.