Media response to Highfield (2012a) and Highfield (2012b). "Possible, but expensive, methods include burying the gas underground between rock layers or ‘scrubbing’ the CO2in power station cooling towers before it is released."

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"Australia is pressing for a ban on geoengineering the oceans with iron sulfate, a process which came to prominence last year after an attempt was made to augment salmon stocks off the Canadian Pacific coast by adding chemicals to ocean waters."

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Discussion of the proposed amendments to the London Protocol. "In essence, this proposal establishes a procedural mechanism for regulating any geoengineering technique involving the introduction of materials to the sea, based on processes previously developed to address ocean fertilization."

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"As greenhouse gas levels increase further, could machines help wash the skies of the excess CO2?"

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