| Agent | Agent interaction | Environment interaction | Swarm application |
|---|---|---|---|
| Molecules | Reaction between `molecules' | None [Random walk?] | SCL World |
| Cells | Mechanical pressure between cells | Diffusion, uptake from substrate medium | BacSim
low (bacsim-low.gif) medium (bacsim-medium.gif) high (bacsim-high.gif) concentrations |
| Organisms | Heat dissipation by trees | Seed dispersal, lightning strikes | Arborscapes |
| Social groups | Trade | Climate, maize potential of area | Village |