Turning overlooked spaces into carbon infrastructure.

50 million years ago, a fast-growing water fern cooled a greenhouse Earth. We think it can do it again, one small pond at a time.

A dense green mat of Azolla fronds covering the water's surface.
Stony Brook University

$450,052 NSF award

National Science Foundation research funding, 2025 to 2027

Pilot ponds growing

On campus at the Life Sciences Building and at residential sites

Featured in the news

SBU News and CPS-VO

A small branching Azolla plant floating in a clear cup, its roots trailing below.

Introducing Azolla

A floating fern smaller than your fingernail that can double its mass in 2 to 5 days.

Our project explores how Azolla can capture atmospheric carbon dioxide, store that carbon, and promote soil health through a cost-effective, scalable strategy.

  • 2 to 5 days to double its mass

  • About 40% carbon when dried, drawn from the air

  • Zero nitrogen fertilizer needed

No nitrogen fertilizer means lower costs over time. Azolla still needs small amounts of other nutrients, mainly phosphorus, which we add with a low-cost fertilizer.

Could your rooftop be a carbon sink?

We're developing small, low-cost ponds designed to turn unused space into places that capture carbon.

How it works

  1. Azolla spreading across a sunlit greenhouse growing tank.

    Grow

    Azolla pulls carbon dioxide from the air as it grows.

  2. Harvested Azolla draining in metal colanders on a lab cart.

    Harvest

    Regular harvesting keeps the plants growing at their fastest. We're developing a robot to do it automatically.

  3. Dried Azolla sealed in a labeled sample bag.

    Store

    Harvested Azolla dries into a lightweight, carbon-rich mass or goes into soil. We're measuring how long the carbon stays.

A prototype of our harvesting robot, designed to harvest Azolla automatically and report data to an online dashboard.

Where we are now

  • The National Science Foundation funds our research.
  • Pilot ponds are growing at university and residential sites.
  • An outdoor study that began in 2025 is tracking how long harvested carbon persists.
  • A robotic harvester is in development, along with an online dashboard so you can see how much carbon you're storing.
  • Proposals to fund sensor and harvester development are currently pending.
The Life Sciences Building pilot pond, full of Azolla, with an Active Research sign.
Our pilot pond outside the Life Sciences Building.
Five members of the research team smiling together among plants in a greenhouse.

Meet the Team

Ecologists, biogeochemists, and modelers at Stony Brook University.

Help us grow

Host a pond or partner with us on a pilot.