The table and pie chart show the proportion of renewable energy generated by different resources in a municipal microgrid in 2024.

| Renewable Resource | Approximate Percentage |
|---|---|
| Biomass | 40% |
| Geothermal | 25% |
| Tidal | 20% |
| Wave | 15% |
State which of these renewable resources contributed approximately 20% of the renewable energy generation.