"A new book by David Hone, Chief Climate Change Adviser at Shell, takes the reader on a journey through the transition in the energy system that must be undertaken to address the climate change issue. The book, Putting the Genie Back: Solving the Climate and Energy Dilemma, deals with a wide range of topics, including carbon pricing, electric cars and solar power, and even ventures into areas such as the somewhat taboo subject of geo-engineering. What follows is an excerpt from the book where Hone discusses the geo-engineering solution."

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"Harvard crosses the Rubicon. But what has really catapulted the idea into the public eye is Harvard’s reckless plan for a privately-funded field trial testing some of the key elements needed for albedo modification"

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Wood, Robert; Ackerman, Thomas; Rasch, Philip; Wanser, Kelly (2017): Could geoengineering research help answer one of the biggest questions in climate science? In: Earth's Future. DOI: 10.1002/2017EF000601.

"Observational studies show influences of aerosol on clouds, but correlations between aerosol and clouds are insufficient to constrain aerosol forcing because of the difficulty in separating aerosol and meteorological impacts. In this commentary, we argue that this current impasse may be overcome with the development of approaches to conduct control experiments whereby aerosol particle perturbations can be introduced into patches of marine low clouds in a systematic manner. Such cloud perturbation experiments constitute a fresh approach to climate science and would provide unprecedented data to untangle the effects of aerosol particles on cloud microphysics and the resulting reflection of solar radiation by clouds."

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"On June 20 2017, Janos Pasztor, the executive director of the Carnegie Climate Geoengineering Governance Initiative (C2G2) announced the setting up of an Advisory Group of leading international experts to guide and support its work in catalyzing the establishment of effective governance for climate geoengineering."

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