This company can help cool the planet for $10 billion a year
As governments and companies look for ways to slow rising global temperatures, geoengineering ideas are moving from academic papers into real business plans. One of the companies drawing attention is California-based Make Sunsets, which has discussed low-cost climate cooling concepts alongside a broader industry push to test solar radiation management. The big number getting attention is $10 billion a year, a price point the company says could support planet-cooling at meaningful scale.
A company puts a price tag on large-scale cooling
Make Sunsets is the company tied to the $10 billion annual figure, and the concept it has discussed is marine cloud brightening. The basic idea is to spray tiny sea salt particles into low marine clouds so those clouds reflect more sunlight, which could reduce warming. The company has described the approach as a relatively low-cost climate intervention compared with the economic damage tied to extreme heat.
The scale attached to the proposal is global, not local. The company’s framing focuses on annual operating cost, with $10 billion presented as enough to run a large, sustained effort rather than a one-time pilot. That number stands out because it is small compared with the trillions of dollars in broader climate-related losses often discussed by governments and insurers.
What is confirmed, and what is still unknown
What is confirmed is the company name, the proposed method, and the annual cost estimate. The proposal centers on ocean areas where marine clouds are common, because those locations offer the right conditions for sea salt particles to increase cloud reflectivity. The company has discussed the concept in broad terms, but it has not released a public map of exact deployment zones tied to a full commercial rollout.
That means there is no confirmed list of specific U.S. coastal communities or states that would be affected by operations. It is also not publicly clear how many vessels, aircraft, or fixed sites would be needed to support a $10 billion annual program. For readers in coastal states like California, Oregon, Washington, or Hawaii, the geographic implications remain under discussion rather than settled.
Why this idea is getting attention now
The reason this proposal is drawing notice is simple: global temperatures have continued to rise, and many climate experts say emissions cuts alone may not reduce heat risks quickly enough. Marine cloud brightening is one of several solar radiation management approaches now being debated because it aims to cool temperatures without waiting decades for atmospheric carbon levels to fall. That speed is a central part of the pitch.
Still, major unknowns remain. Researchers and policymakers have raised questions about governance, environmental side effects, and who would control any system designed to alter cloud behavior at scale. For the public, the practical takeaway is that this remains a developing climate technology proposal, not a routine public utility, and any wider use would depend on future testing, oversight, and public disclosure.
