News Summary

The U.S. Environmental Protection Agency (EPA) has launched an investigation into Make Sunsets, a geoengineering startup founded by two individuals from Silicon Valley. The company, which has raised $750,000 with investors including Boost VC, Draper Associates, and Pioneer Fund, uses weather balloons filled with hydrogen gas and sulfur dioxide particles to cool the Earth’s atmosphere by reflecting sunlight. The EPA is concerned about the release of sulfur dioxide, a regulated air pollutant, which could have adverse respiratory effects if the particles drift closer to the ground. Make Sunsets argues that its actions are legal under the Weather Modification Act of 1976. The controversy highlights the complexities and potential environmental impacts of geoengineering efforts as the world grapples with climate change.