Enhanced weathering: an effective and cheap tool to sequester CO 2. Negative Emissions Technologies And Reliable Sequestration (National Academy of Sciences, 2018). The Royal Society Greenhouse Gas Removal Technologies (The Royal Society, 2018). Young people’s burden: requirement of negative CO 2 emissions. Concerns of young protesters are justified. United Nations Environment Programme The Emissions Gap Report 2018 (United Nations Environment Programme, 2018). Macroeconomic impact of stranded fossil fuel assests. Farming with crops and rocks to address global climate, food and soil security. Review and outlook for agromineral research in agriculture and climate change mitigation. Potential of global croplands and bioenergy crops for climate change mitigation through deployment for enhanced weathering. An IPCC Special Report on the Impacts of Global Warming of 1.5 ☌ Above Pre-Industrial Levels and Related Global Greenhouse Gas Emission Pathways (World Meteorological Organization, 2018). Intergovernmental Panel on Climate Change (IPCC). Source data are provided with this paper. Datasets for projections of future GDP linked to Shared Socioeconomic Pathways are available at.
Datasets on gross national income per capita are available at. Datasets on mining costs are available at. Datasets on diesel prices are available at. Datasets on global soil temperature are available at, accessed on 18 December 2019. Datasets on global soil surface pH are available at, accessed on 18 December /2019. Datasets on global precipitation are available at, accessed on 18 December 2019. Datasets on global crop irrigation are available at, accessed on 18 December 2019. We discuss the challenges and opportunities of ERW deployment, including the potential for excess industrial silicate materials (basalt mine overburden, concrete, and iron and steel slag) to obviate the need for new mining, as well as uncertainties in soil weathering rates and land–ocean transfer of weathered products.ĭatasets on global crop production and yield are available at, accessed on 18 December 2019. However, success will depend upon overcoming political and social inertia to develop regulatory and incentive frameworks. Deployment within existing croplands offers opportunities to align agriculture and climate policy. These goals and costs are robust, regardless of future energy policies. China, India, the USA and Brazil have great potential to help achieve average global CDR goals of 0.5 to 2 gigatonnes of carbon dioxide (CO 2) per year with extraction costs of approximately US$80–180 per tonne of CO 2. Here we use an integrated performance modelling approach to make an initial techno-economic assessment for 2050, quantifying how CDR potential and costs vary among nations in relation to business-as-usual energy policies and policies consistent with limiting future warming to 2 degrees Celsius 5. ERW also has possible co-benefits for improved food and soil security, and reduced ocean acidification 2, 3, 4. Nature volume 583, pages 242–248 ( 2020) Cite this articleĮnhanced silicate rock weathering (ERW), deployable with croplands, has potential use for atmospheric carbon dioxide (CO 2) removal (CDR), which is now necessary to mitigate anthropogenic climate change 1. Potential for large-scale CO 2 removal via enhanced rock weathering with croplands