"It is no longer prudent for the environmental movement to think of geoengineering as a closeted secret of quack scientists or something out of an Isaac Asimov novel. [...] There is an urgency that is required of the environmental movement to talk about what failure to win on mitigation or adaptation on a large scale, in meaningful ways, could likely result in – geoengineering/climate engineering of the environment as the only option."

Link

Seidel, Dian J.; Feingold, Graham; Jacobson, Andrew R.; Loeb, Norman (2014): Detection limits of albedo changes induced by climate engineering. In Nature Climate change 4 (2), pp. 93–98. DOI 10.1038/nclimate2076.

"We show that satellite observations permit detection of large increases, but interannual variability overwhelms the maximum conceivable albedo increases for some schemes."

Link

Info video.

Link (English), link (German)

Feliciano, Diana (2013): The ethics of geoengineering. In: World Social Science Report 2013: OECD Publishing. DOI 10.1787/9789264203419-en

"The social sciences have a role to play in clarifying the moral hazards associated with geoengineering, given that future generations may have no other choice but to implement such projects."

Link, link (pdf)