KEY POINTS
- Luke Iseman, a serial inventor and the former director of hardware at Y Combinator, has raised at least $500,000 to launch his sunlight reflection company, Make Sunsets.
- Make Sunsets plans to launch three balloon test launches releasing sulfur dioxide to cool the atmosphere in January from the land Iseman owns in Baja, Mexico.
- Climate scientists who have been involved with solar geoengineering for a long time say the Make Sunsets balloon launches are not going to generate productive research and that the field needs to be governed by an international body.

