The table shows the energy mix used for electricity generation in Spain in 2018 and a prediction for 2045.

| Energy Source | 2018 (%) | 2045 (predicted %) |
|---|---|---|
| Coal and Lignite | 18 | 2 |
| Natural Gas | 25 | 20 |
| Nuclear | 22 | 12 |
| Solar and Wind | 20 | 46 |
| Hydroelectric | 15 | 20 |
Discuss the effects on the environment of two predicted changes between 2018 and 2045.