Ocean fertilisation: Introducing iron into parts of the ocean to stimulate phytoplankton growth and thus absorb CO2. Enhanced rock weathering:
In our civilization’s effort to slow down and stop Climate Change and reverse Global Warming, geoengineering should not be considered the only solution, but rather an important part of a comprehensive, integrated, international program that mitigates the effects of Global Warming, restores our biosphere and addresses the root causes of Climate Change (i.e., the use of fossil fuels and carbon dioxide emissions, human population growth, consumptive lifestyles, unsustainable practices, degradation of natural ecosystems, etc.). An IPCC Special Report on the impacts of global warming of 1.5°C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty [Masson-Delmotte, V., P. An IPCC Special Report on the impacts of global warming of 1.5°C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty [Masson-Delmotte, V., P.
# Article Nature-based and geo-engineering climate mitigation technologies: Public acceptance and security prospects. Public attitudes strongly favor nature-based climate solutions like reforestation. Sociodemographic factors like education and region shape climate-tech perceptions. Logistic regression models show public support for varied climate mitigation methods. Climate change requires mitigation approaches, from nature-based to experimental geoengineering. We examined public attitudes toward six strategies—reforestation in previously forested areas, afforestation in new terrains, direct CO2 capture with underground storage, biomass energy with CO2 capture, stratospheric sulfate aerosols, and orbital mirrors—via a representative Czech survey (*N* = 3,007). Results show strong favor for reforestation and afforestation due to ecological benefits and long-term promise; sulfate aerosols and orbital mirrors face skepticism. Older respondents favored biomass-based carbon capture but less so certain high-tech solutions. Our findings highlight the importance of policies aligned with diverse public views, ensuring both established and novel measures are harmonized into an effective climate mitigation strategy. These results indicate demographic contexts shape acceptance of climate interventions.
Solar geoengineering (SG) refers to a set of methods aimed at cooling the Earth in order to counteract the warming effects of increases in greenhouse gases (
# Need To Know: Geoengineering and Cloud Seeding. No comments on Need To Know: Geoengineering and Cloud Seeding. Techniques to deliberately alter Earth’s climate, such as geoengineering and cloud seeding, have been in the news following the devastating floods in Texas. Lamb, an associate research scientist in the Department of Earth and Environmental Engineering at Columbia University, introduces the science underlying geoengineering and weather modification and discusses their implications for future climate mitigation strategies. Another set of methods, referred to under the umbrella of Solar Radiation Management (SRM), aim to increase the reflection of sunlight from the Earth’s atmosphere in order to cool the Earth’s climate. The most studied of these methods is stratospheric aerosol injection, which proposes to put sulfate aerosols high up in the Earth’s atmosphere to cool the climate (this is similar to the cooling effect that is observed after a large volcanic eruption, such as Mount Pinatubo in 1991). atmospheric science, climate change, cloud seeding, geoengineering, Kara D.
However, research shows that using solar geoengineering could indirectly lower the amount of CO2 in the atmosphere by stemming permafrost melt, reducing energy-sector emissions and causing changes to the carbon-cycle feedback. Aerosol injection could have an edge on other proposed forms of solar geoengineering because it would not require a large technological leap to become a reality, Jones says:. These brighter clouds would reflect away more sunlight, says Prof Douglas MacMartin, an engineering researcher from Cornell University, who contributed to the US House of Representatives’ hearing on geoengineering. Earlier this month, MacMartin, Keith and Prof Katharine Ricke, a climate scientist from the University of California, San Diego, published a research paper exploring how solar geoengineering – via releasing aerosols into the stratosphere – could be used as part of an “overall strategy” for limiting global warming to 1.5C, which is the aspirational target of the Paris Agreement. However, the researchers point out that using solar geoengineering to hold global warming to 1.5C would not have the same environmental effect as reaching the target using mitigation.
The Harvard Solar Geoengineering Research Program (SGRP) aims to reduce uncertainties surrounding solar geoengineering; generate critical science, technology, and policy insights; and help inform the public debate surrounding this controversial idea. Recognizing that solar geoengineering could not be a replacement for reducing emissions or adapting to climate impacts, SGRP draws on Harvard’s research capabilities and global convening power to provide the knowledge necessary in considering solar geoengineering as a supplement to broader mitigation and adaptation efforts. The Harvard Solar Geoengineering Research Program (SGRP) aims to reduce uncertainties surrounding solar geoengineering; generate critical science, technology, and policy insights; and help inform the public debate surrounding this controversial idea. Recognizing that solar geoengineering could not be a replacement for reducing emissions or adapting to climate impacts, SGRP draws on Harvard’s research capabilities and global convening power to provide the knowledge necessary in considering solar geoengineering as a supplement to broader mitigation and adaptation efforts. * In 1980, Professor Tom Schelling chaired a National Academy of Sciences committee whose report, *Changing Climate*, addressed the potential for solar geoengineering to counter global warming.
For example, geoengineering includes the removal of carbon dioxide from the atmosphere (also called Carbon Dioxide Removal – CDR) through methods such as direct air capture and storage, ocean iron fertilization, or ocean alkalinity enhancement. These activities are referred to as **Solar Geoengineering** or **Solar Radiation Modification (SRM).** Most proposed solar radiation modification techniques involve adding material to the atmosphere to increase the amount of incoming sunlight reflected back to space. Marine solar radiation management (mSRM) techniques, on the other hand, involve adding materials to ocean waters, sea ice, or the lower atmosphere to increase the amount of solar radiation reflected at or near the ocean's surface to limit surface warming or sea ice melt. * *Marine Cloud Brightening (MCB)* – adding particles, such as sea spray, to the lower atmosphere (near the surface) to increase the reflectivity of clouds over the ocean. Another subset of geoengineering activities intends to cool the Earth by intentionally modifying the concentration of certain gases in the atmosphere, including carbon dioxide.