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Cooling Credits: Subscription

Subscribe and get a 90% discount when buying in quantities of 30 Cooling Credits a month.
30 Cooling Credits / Month.

For custom subscriptions, click here.

Cooling Credit

Cooling Credit

You are offsetting the warming effect of 1 ton of carbon dioxide for 1 year!


Inspired by the natural cooling effects of volcanoes, our balloons release tiny reflective particles into the stratosphere. Think of it as applying sunscreen for our planet!

One Cooling Credit offsets one ton of CO2 warming for a year. The average American generates 16 tons of CO2 per year.

By purchasing a Cooling Credit, your funds will be used to release at least 1 gram of our "clouds" into the stratosphere on your behalf, offsetting the warming effect of 1 ton of carbon dioxide for 1 year. We will share the fulfillment of your Cooling Credit order after deployment via email with the location, time, date, serial number(s) of your Cooling Credits, and video footage. You can also look on your account page for previous orders.

Your purchase is refundable at any time pre-deployment. The current fulfillment time for Cooling Credits is 30 days and 8 hours.

If you or your company wants to offset more than 1,000 tons of CO2, please enter a quantity over 1,000 Cooling Credits, and an automatic discount will be applied. Questions? Please schedule time using this link.

How our balloons work

We currently use biodegradable latex balloons filled with helium and sulfur dioxide (SO₂). The amount of helium we put in is based on the size of the balloon, the weight of the payload, and when we want the balloon to burst to release the reflective cloud. Once launched from the ground, the balloon expands from the decreasing air pressure as it gets higher until it bursts. Once the balloon bursts, the parachute opens and the instrumentation floats down. The general flight time is three to five hours. We carry instrumentation to retrieve the balloon and collect data on the deployment.

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Why others have joined cooling Earth
  • We should obviously be doing solar geoengineering. We are on track to radically reduce emissions in the coming years but thermal damage will lag our course correction so most of our climate pain is still ahead of us. Why risk destabilizing the West Antarctic ice sheet or melting the arctic permafrost or wet bulbing a hundred million people to death? Solar geoengineering can incrementally and reversibly buy down the risk during this knife-edge transition to a better future. We owe future generations to take all practical steps to dodge avoidable catastrophic and lasting damage to our planet.

    Casey Handmer, PhD from Caltech
  • It’s a small way I can help with a seemly very large problem! For what it’s worth, $200 offset 20 tons of CO2 is a great win!

    Brian Vallelunga, CEO of Doppler
  • At some point, you learn about reflective particles as a potential cooling method. The next question would be: 'Is anyone doing this now?' This led to the discovery of Make Sunsets, a team that not only explores solar radiation management techniques but also works to implement them. It's incredibly reassuring to see a group like Make Sunsets pushing the boundaries of scientific research, aiming to create a cooler, more sustainable future for everyone.

    Kevin S. Thompson, Austin, Texas