„The agreement reached in Paris is a monumental achievement, but it will only become real if individual countries make good on their commitments, including conversion of energy production and use away from fossil fuels to renewables. This, in turn, will require a huge effort by the technical community funded by investors and corporations to make green energy better and cheaper — and soon.“
„In order to hit the goal of warming “well below” 2 degrees Celsius, we’re relying on a host of unproven, risky future technologies.“
On CCS and BECCS. „Ethanol, saltwater and fermentation all get involved“
„Dissipating haze from plane exhaust alters how sunlight reaches the Earth and may be unintentionally affecting our climate“
By Josh Horton. „In his post “Why We Shouldn’t Be In a Hurry to Redefine ‘Climate Engineering,’” Duncan McLaren presents a thoughtful argument against the view that the two main families of potential climate engineering technologies—solar radiation management (SRM) and carbon dioxide removal (CDR)—should be treated as separate and distinct groups of climate response strategies.[nbsp] In this brief comment, I will argue that McLaren’s presentation of the case for disaggregation is lacking in significant respects, and that a more thorough consideration of the arguments leads to the conclusion that, as a general rule, SRM and CDR should indeed be treated as fundamentally different forms of potential climate intervention.“
No intentional climate engineering, but unintended whitening effects from air traffic. „Planes may be making a high-altitude icy haze that is brightening US skies, according to a group of scientists.“
„Further, it is pointed out that the enhancement of carbon sinks is already included in the UN Framework Convention on Climate Change agreements, and, moreover, that IPCC projections rely on unspecified negative emissions (often inappropriately assumed to be implausibly large deployments of Bioenergy with Carbon Capture and Storage (BECCS)) to prevent high probabilities of temperature rises exceeding 2oC. In this context, it is suggested, we should get on with the important business of developing CDR, and avoid the distractions that arise from it being labelled as geoengineering.“
„The effort to limit global climate change relies on technologies that are unproven or even illusory.“
By Juan Moreno-Cruz, and Soheil Shayegh. „Solar geoengineering (SGE) offers the possibility of offsetting greenhouse-gas-induced temperature increases by reducing incoming solar radiation. Its key advantages are 1) it is fast. Unlike emissions reductions, which can take decades to bear results, SGE can reduce global temperatures nearly instantaneously. 2) it is cheap. SGE can potentially reduce temperatures at costs that are several orders of magnitude lower compared to abatement – this has been called “the incredible economics of geoengineering”.“
„EU climate chief says that aspirational 1.5C target was put into Paris climate deal at insistence of ‘most exposed countries’ and will require new strategies“
