but once you've attained adequate geothermal technology, wouldn't that dominate as the main source of energy? i mean, one zettajoule is quite a lot.Trefoil said:An ideal scenario for the near future (a few decades) would be something like 10% solar, 10% hydro, 10% wind, 10% geothermal, 20% nuclear, 40% coal. Right now it's something like 90% coal. That's not good. Places in Europe are heading towards a weighting like this.