"Too much carbon dioxide in the atmosphere is the primary cause of climate change. To stop climate change, we need to stop adding CO2 to the atmosphere and start taking it out. With renewable energy and direct-air CO2 capture, we can do both, and we can do them in ways that save money."

LINK

Moon, Twila A. (2018): Geoengineering might speed glacier melt. In Nature 556 (7702), p. 436. DOI: 10.1038/d41586-018-04897-5.

"We disagree with John Moore and colleagues that geoengineering could counter rising sea levels from the melting of the Greenland and Antarctic ice sheets (Nature 555, 303–305; 2018). As environmental researchers in these regions, we contend that the consequences of the technology could be even more serious than in its absence."

LINK

Fajardy, Mathilde; Mac Dowell, Niall (2018): The energy return on investment of BECCS. Is BECCS a threat to energy security? In Energy Environ. Sci. 40, p. 401. DOI: 10.1039/C7EE03610H.

"In this contribution, we evaluate the energy return on investment (EROI) of an archetypal BECCS facility. In order to highlight the importance of biomass sourcing, two feedstock scenarios are considered: use of domestic biomass pellets (UK) and import of biomass pellets from Louisiana, USA. We use the Modelling and Optimisation of Negative Emissions Technologies (MONET) framework to explicitly account for growing, pre-treating, transporting and converting the feedstock in a 500 MW BECCS facility. As an example, we illustrate how the net electricity balance (NE_lB) of a UK-based BECCS facility can be either positive or negative, as a function of supply chain decisions."

LINK

Davies, Philip A.; Yuan, Qingchun; Richter, Renaud Charles de (2018): Desalination as a Negative Emissions Technology. In Environ. Sci.: Water Res. Technol. DOI: 10.1039/C7EW00502D.

"In this study, we propose treating desalination reject brine by electrolysis to form Mg(OH)2 and thus absorb CO2 via the oceans. The energy and water penalties associated with the electrolysis are calculated as 1.8 GJ/tCO2 and 13.7 m3/tCO2 respectively, making it an interesting option in comparison with some other types of NET. However, NET-modification more than doubles the specific energy consumption of a reverse-osmosis desalination plant. It is concluded that NET-desalination has potential to contribute to CDR in arid countries (especially if solar energy is used) thus helping to meet Intended Nationally Determined Contributions (INDCs) following the COP21 summit."

LINK