Dutch king Willem-Alexander attends the opening of BioWarmteCentrale (bioheating station) in Purmerend, the Netherlands.
Koen van Weel

Dutch king Willem-Alexander attends the opening of BioWarmteCentrale (bioheating station) in Purmerend, the Netherlands. It provides 80 percent green energy for 25,000 people, powered by 110,000 tons of biomass per year.