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Climate change is a pressing issue that requires urgent action to mitigate its effects. While reducing greenhouse gas emissions is crucial, some experts are exploring the concept of geoengineering as a potential solution to combat climate change. Geoengineering involves human interventions in climate systems with the goal of preserving ecosystems and cooling the planet.
This story is part of our Concepts Special, in which we reveal how experts think about some of the most mind-blowing ideas in science. Read more here
Defining the scope of geoengineering can be complex, ranging from simple actions like reforestation to more controversial methods such as manipulating sunlight in the atmosphere. The level of risk and potential benefits vary across different geoengineering techniques, with some posing significant challenges in terms of ethics and unintended consequences.
One prominent geoengineering idea is solar radiation management (SRM), which aims to reflect more sunlight back into space to cool the planet. While this approach could have a cooling effect, it also carries risks such as disrupting rainfall patterns and cloud formation. Despite previous taboos surrounding SRM research, the escalating climate crisis has led to increased interest and debate among scientists, policymakers, and activists.
There are diverging opinions on the feasibility and implications of geoengineering. While some argue that focusing on emissions reductions is paramount and geoengineering could detract from these efforts, others believe that exploring geoengineering options is necessary to address the current climate emergency. The need for international collaboration and ethical frameworks to guide geoengineering research is becoming increasingly apparent.
Concerns also arise regarding the distribution of research efforts and decision-making power in geoengineering initiatives. Lower-income countries, particularly those most vulnerable to climate impacts, often have limited involvement in geoengineering research, despite being disproportionately affected by its outcomes. Efforts to empower these countries to participate in geoengineering discussions and research are crucial for ensuring equitable decision-making.
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