Hydroelectric power plants can generate vast amounts of electricity. The technology is emissions-free, reliable and safe. But large dams and hydropower facilities can sometimes create more problems than they can solve. Learn more in the latest GLOBAL IDEAS multimedia dossier http://bit.ly/GI_dossierHydro

In the Honduran city of La Esperanza, an old dam has been refitted to produce green energy. Designed with climate protection in mind from the start, the facility was the first project worldwide that was allowed to sell carbon emission certificates after the 1997 Kyoto treaty. The re-build power supply has created 70 new jobs and it provides electricity to surrounding villages. 30,000 tons of CO2 are reduced annuall.