10.10.2021

# New Publications

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Haque, Fatima; et al. (2021): Urban Farming with Enhanced Rock Weathering As a Prospective Climate Stabilization Wedge

Haque, Fatima; Santos, Rafael M.; Chiang, Yi Wai (2021): Urban Farming with Enhanced Rock Weathering As a Prospective Climate Stabilization Wedge. In Environmental science & technology. DOI: 10.1021/acs.est.1c04111.

"With no single carbon capture and sequestration solution able to limit the global temperature rise to 1.5–2.0 °C by 2100, additional climate stabilization measures are needed to complement current mitigation approaches. Urban farming presents an easy-to-adopt pathway toward carbon neutrality, unlocking extensive urban surface areas that can be leveraged to grow food while sequestering CO2. Urban farming involves extensive surface areas, such as roofs, balconies, and vertical spaces, allowing for soil presence and atmospheric carbon sequestration through air-to-soil contact. In this viewpoint we also advocate the incorporation of enhanced rock weathering (ERW) into urban farming, providing a further opportunity for this recognized negative emissions technology that is gaining momentum worldwide to gain greater utilization."

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08.10.2021

# Media

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Green Wire: USDA pledges billions for climate-smart farm projects, resilience

"Agriculture Secretary Tom Vilsack said today he’ll use billions of dollars from a Depression-era agency to pay for a carbon-saving program for farms, and to help farmers prepare for drought and adverse weather associated with climate change."

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08.10.2021

# New Publications

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Berndes, Göran; Cowie, Annette (2021): Land sector impacts of early climate action

Berndes, Göran; Cowie, Annette (2021): Land sector impacts of early climate action. In Nat Sustain 3, p. 515. DOI: 10.1038/s41893-021-00777-5.

"Integrated assessment models are widely used to assess climate change mitigation strategies. Comparing scenarios from several integrated assessment models, a study now highlights the benefits and trade-offs of near-term mitigation to reduce mitigation challenges in the longer term."

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04.10.2021

# Media

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Video: Agriculture: How our soil can save the climate (Planet B, BR) (German)

German video on soil carbon sequestration.

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27.09.2021

# Media

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GreenBiz: Amazon invests in the Amazon

"Early this month, Amazon launched a regenerative agriculture and agroforestry accelerator to help farmers restore the company's namesake forest ecosystem, increase carbon removals and create income sources for farmers that encourages sustainable practices instead of ones based on environmentally harmful practices."

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27.09.2021

# New Publications

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Khanna, Madhu; et al. (2021): Redefining marginal land for bioenergy crop production

Khanna, Madhu; Chen, Luoye; Basso, Bruno; Cai, Ximing; Field, John L.; Guan, Kaiyu et al. (2021): Redefining marginal land for bioenergy crop production. In GCB Bioenergy 13 (10), pp. 1590–1609. DOI: 10.1111/gcbb.12877.

"Marginal land has received wide attention for its potential to produce bioenergy feedstocks while minimizing diversion of productive agricultural land from food crop production. However, there has been no consensus in the literature on how to define or identify land that is marginal for food crops and beneficial for bioenergy crops. Studies have used different definitions to quantify the amount of such land available; these have largely been based on assumed biophysical thresholds for soil quality and productivity that are unchanging over space and time. We discuss the limitations of these definitions and the rationale for considering economic returns and environmental outcomes in classifying land as marginal."

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10.09.2021

# Media

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Yale Environment 360: How Adding Rock Dust to Soil Can Help Get Carbon into the Ground

"Researchers are finding that when pulverized rock is applied to agricultural fields, the soil pulls far more carbon from the air and crop yields increase. More studies are underway, but some scientists say this method shows significant benefits for farmers and the climate."

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06.09.2021

# New Publications

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Wu, Zitao; Zhai, Haibo (2021): Consumptive life cycle water use of biomass-to-power plants with carbon capture and sequestration

Wu, Zitao; Zhai, Haibo (2021): Consumptive life cycle water use of biomass-to-power plants with carbon capture and sequestration. In Applied Energy 303, p. 117702. DOI: 10.1016/j.apenergy.2021.117702.

"Biomass-to-power conversion provides the most promising route to bioenergy with carbon capture and sequestration (BECCS). The objectives of this study are to estimate the water consumption of biomass-to-power plants with CCS and then quantify its variability and uncertainty on a life cycle basis. The fuel-based life cycle analysis reveals that compared to the case of complete coal combustion with CCS, co-firing biomass at coal-fired power plants with CCS significantly increases the life cycle blue water consumption, depending on the type, co-firing rate, and production location of biomass; and dedicated biomass combustion with CCS further increases the life cycle blue water consumption by a factor of more than 55."

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03.09.2021

# New Publications

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Joseph, Stephen; et al. (2021): How biochar works, and when it doesn't: A review of mechanisms controlling soil and plant responses to biochar

Joseph, Stephen; Cowie, Annette L.; van Zwieten, Lukas; Bolan, Nanthi; Budai, Alice; Buss, Wolfram et al. (2021): How biochar works, and when it doesn't: A review of mechanisms controlling soil and plant responses to biochar. In GCB Bioenergy 755 (1), p. 142582. DOI: 10.1111/gcbb.12885.

"We synthesized 20 years of research to explain the interrelated processes that determine soil and plant responses to biochar. The properties of biochar and its effects within agricultural ecosystems largely depend on feedstock and pyrolysis conditions. We describe three stages of reactions of biochar in soil: dissolution (1–3 weeks); reactive surface development (1–6 months); and aging (beyond 6 months)."

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20.08.2021

# New Publications

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Vakilifard, Negar; et al. (2021): The role of enhanced rock weathering deployment with agriculture in limiting future warming and protecting coral reefs

Vakilifard, Negar; Kantzas, Euripides P.; Neil R, Edwards; Holden, Philip B.; Beerling, David J. (2021): The role of enhanced rock weathering deployment with agriculture in limiting future warming and protecting coral reefs. In Environ. Res. Lett. 16 (9), p. 94005. DOI: 10.1088/1748-9326/ac1818.

"Meeting the net-zero carbon emissions commitments of major economies by mid-century requires large-scale deployment of negative emission technologies (NETs). Terrestrial enhanced rock weathering on croplands (ERW) is a NET with co-benefits for agriculture, soils and ocean acidification that creates opportunities for generating income unaffected by diminishing carbon taxes as emissions approach net-zero. Here we show that ERW deployment with croplands to deliver net 2 Gt CO2 yr−1 removal approximately doubles the probability of meeting the Paris 1.5 °C target at 2100 from 23% to 42% in a high mitigation Representative Concentration Pathway 2.6 baseline climate."

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