Summary:

- The article discusses a startup called Make Sunsets, which is exploring the idea of solar geoengineering as a way to combat climate change. Solar geoengineering involves releasing small particles into the upper atmosphere to reflect some of the sun's rays back into space, potentially cooling the planet.

- The article explains that Make Sunsets has already conducted small-scale tests of releasing these particles, known as sulfur aerosols, and plans to scale up its operations. However, the company's activities have faced criticism and regulatory uncertainty, as the potential risks and long-term effects of solar geoengineering are not yet fully understood.

- The article highlights the ongoing debate around the use of solar geoengineering, with some experts arguing it could be a valuable tool to mitigate the worst impacts of climate change, while others raise concerns about the potential unintended consequences and the need for robust governance and oversight of such technologies.