July 2017

22.07.2017

# Media

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Wired: Climate Change Is Here. It’s Time to Talk About Geoengineering

"Heat reduction is currently more practical. You can do it many ways, and all of them involve either blocking the sun's heat from coming into Earth’s atmosphere, or allowing more of Earth's heat to radiate into space. For blocking heat, sulfur injections are probably the most likely to work. "It scatters and reflects solar radiation back into space," says Ulrike Niemeier, a climate scientist at the Max Planck Institute for Meteorology, and co-author of a new paper in Science discussing that geoengineering technology and its risks."

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22.07.2017

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Independent: Carbon dioxide must be removed from the atmosphere to avoid extreme climate change, say scientists

"One of the first scientists to warn of the dangers of climate change, Professor Jim Hansen, warns the 's*** is hitting the fan'"

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22.07.2017

# Media

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Global News Wire: Climeworks Wins First Helena Prize

"Helena, a global NGO and think tank, and The Boston Consulting Group (BCG), one of the world’s leading management consultancies, announced today that Zurich-based firm Climeworks has been named the first recipient of The Helena Prize, a worldwide award designed to spur and support young entrepreneurs fighting climate change. Climeworks is the first company to develop and install a commercial plant to capture carbon dioxide from the air."

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22.07.2017

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Center for Carbon Removal: Republicans and Democrats Agree on Carbon Dioxide Removal

"Yesterday, hell froze over: U.S. Senate Republicans and Democrats agreed. What got these often warring parties together? Carbon Dioxide Removal. Specifically, a tax credit that incentivizes carbon capture, storage and utilization."

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21.07.2017

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Tagesspiegel: Thermostat of the World (German)

German newspaper article of IASS member.

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21.07.2017

# Media

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Spiegel: Plan B for a Hot Earth (German)

German political magazine article on CE and climate policy.

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21.07.2017

# New Publications

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Moreno-Cruz, Juan B.; et al. (2017): An Economic Anatomy of Optimal Climate Policy

Moreno-Cruz, Juan B.; Wagner, Gernot; Keith, David W. (2017): An Economic Anatomy of Optimal Climate Policy. (HKS Faculty Research Working Paper Series, RWP17-028).

"This paper introduces geoengineering into an optimal control model of climate change economics. Together with mitigation and adaptation, carbon and solar geoengineering span the universe of possible climate policies. We show in the context of our model that: (i) a carbon tax is the optimal response to the unpriced carbon externality only if it equals the marginal cost of carbon geoengineering; (ii) the introduction of solar geoengineering leads to higher emissions yet lower temperatures, and, thus, increased welfare; and (iii) solar geoengineering, in effect, is a public goods version of adaptation that also lowers temperatures."

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21.07.2017

# New Publications

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Pasztor, Janos; et al. (2017): How to govern geoengineering?

Pasztor, Janos; Scharf, Cynthia; Schmidt, Kai-Uwe (2017): How to govern geoengineering? In: Science 357 (6348), S. 231. DOI: 10.1126/science.aan6794.

"The Paris Agreement aims to limit the global temperature rise to 1.5° to 2°C above preindustrial temperature, but achieving this goal requires much higher levels of mitigation than currently planned. This challenge has focused greater attention on climate geoengineering approaches, which intentionally alter Earth's climate system, as part of an overall response starting with radical mitigation. Yet it remains unclear how to govern research on, and potential deployment of, geoengineering technologies."

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20.07.2017

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The Conversation: Inaction on climate change risks leaving future generations $530 trillion in debt

"The Paris Agreement in 2015 saw the international community agree to limit warming to within 2°C. The Hansen team argue that the much safer approach is to reduce atmospheric concentrations of CO₂ from the current annual average of more than 400ppm (parts per million) back to 1980s levels of 350ppm. This is a moderately more ambitious goal than the aspiration announced in Paris to further attempt to limit warming to no more than 1.5°C. Many climate scientists and policymakers believe that either the 2°C or 1.5°C limits will only be possible with negative emissions because the international community will be unable to make the required reductions in time. "

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20.07.2017

# New Publications

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Hansen, James; et al. (2017): Young people's burden. Requirement of negative CO2 emissions

Hansen, James; Sato, Makiko; Kharecha, Pushker; Schuckmann, Karina von; Beerling, David J.; Cao, Junji et al. (2017): Young people's burden. Requirement of negative CO2 emissions. In Earth Syst. Dynam. 8 (3), pp. 577–616. DOI: 10.5194/esd-8-577-2017

"Targets for limiting global warming thus, at minimum, should aim to avoid leaving global temperature at Eemian or higher levels for centuries. Such targets now require negative emissions, i.e., extraction of CO2 from the air. If phasedown of fossil fuel emissions begins soon, improved agricultural and forestry practices, including reforestation and steps to improve soil fertility and increase its carbon content, may provide much of the necessary CO2 extraction."

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