The climate change scientists racing to dim the sun

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illuminem summarises for you the essential news of the day. Read the full piece The Telegraph or enjoy below:

🗞️ Driving the news: Scientists and startups are accelerating research into solar geoengineering, a controversial technology that aims to cool the planet by reflecting sunlight back into space, effectively “dimming the sun” to counter global warming

🔭 The context: Solar radiation modification (SRM) includes techniques such as releasing reflective aerosols into the upper atmosphere or brightening clouds
• Research efforts are expanding, with the Advanced Research and Invention Agency (ARIA) in the United Kingdom funding multiple experiments, while startups like Stardust and Make Sunsets pursue private-sector solutions

🌍 Why it matters for the planet: Solar geoengineering could theoretically cool global temperatures quickly without reducing emissions, but it carries major environmental risks
• Scientists warn it could disrupt rainfall patterns, intensify storms in some regions, and create long-term dependence on the technology if deployed at scale

⏭️ What’s next: Researchers are pushing for small-scale outdoor experiments and global governance frameworks before any large-scale deployment
• Experts stress that without clear international rules, geoengineering could be pursued unilaterally by governments or private actors

💬 One quote: “If you stop the sun’s rays from reaching the surface of the Earth, it’s cooler, as it is on a cloudy day.” — Hugh Hunt, University of Cambridge

📈 One stat: The 1991 eruption of Mount Pinatubo injected about 15 million tonnes of sulfur dioxide into the atmosphere, temporarily cooling global temperatures by roughly 1°F (0.5°C)

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