Geoengineering proposes to take much more proactive measures such as injecting aerosol into the stratosphere to increase solar reflection.
Carbon Dioxide Removal (CDR) techniques, which remove CO2 from the atmosphere. As they address the root cause of climate change, rising CO2 concentrations, they
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.
2 These studies include the Royal Society report mentioned in (1) and two reports from the US Na-tional Research Council: Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration (2015), and Climate Intervention: Reflecting Sunlight to Cool Earth (2015), The National Acadamies Press, Washington, D.C. 182 8 Geoengineering Counteracting approached a tipping point—a threshold beyond which the Earth would enter a vastly different climate state—then emergency measures would likely garner more serious attention. 1.1 Types of Climate Intervention Geoengineering methods fall under two classes: 1) Carbon dioxide removal (CDR), which removes CO2 from the atmosphere, and 2) solar radiation management (SRM), which reflects sunlight back into space. Box 8.1: Exercise to examine the mass scales involved in one type of enhanced chemical weathering6 185 Geoengineering 8 CO2 Removal 2.2 Ocean Fertilization Another of Nature’s ways of removing CO2 from the atmosphere is through photosynthesis by phytoplankton at the surface of the ocean (Figure 8.2).
Geoengineering is the deliberate large-scale interventions in the Earth's climate system intended to counteract human-caused climate change.
Methods include releasing large amounts of tiny reflective particles (e.g., sulfur dioxide) into the stratosphere, deploying mirrors in space,
# 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.
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.