[vilda]

While cleaner, technically geothermal energy is not renewable. After couple of years the area is cooled down and efficiency drops. For example, one project planned in central Europe is expected to last only 15 years. Then re-drilling is necessary or leaving the drill to re-charge. Among other risks, contamination of underground water and earthquakes are commonly mentioned.

[stareatgoats]

Agreed, geothermal in that form is not a good option. They (we) need to come up with a better, more sustainable technology. If found, then geothermal holds the promise of providing all the energy we might need (and satisfy a certain amount of greed as well).