1. Soil Stabilization: On tropical islands, wind and water cause Coastal Erosion. By clicking, you are planting "Pioneer Species"—hardy plants that hold the sand together with their roots.
2. Carbon Sequestration: Through the process of Photosynthesis, your island's trees pull $CO_2$ from the atmosphere and turn it into oxygen and biomass (wood and leaves).
3. The Carbon Sink: When you reach 100kg of $CO_2$ saved, your island becomes a "Carbon Sink." This means the ecosystem is now cooling the planet by locking away more pollution than it creates.