The table and charts show the electricity generation mix for the island nation of Eloria in 2012 and 2024.

| Energy Source | 2012 (%) | 2024 (%) |
|---|---|---|
| Heavy Fuel Oil (HFO) | 42 | 5 |
| Coal | 30 | 8 |
| Biomass | 5 | 22 |
| Offshore Wind | 10 | 45 |
| Geothermal | 13 | 20 |
Discuss the effects on the environment of two of the changes in Eloria's electricity mix between 2012 and 2024.