Green Light Green Light Clean energy is a Danish passion. Green Light Clean energy is a Danish passion. Today, 50% of electricity in Denmark is supplied by wind and solar power. Wind energy is well-established in Denmark, which long ago decided to put the Danish climate’s constant breezes and blusters to practical use. Now Denmark produces almost twice as much wind energy per capita as the runner-up among industrialised countries in the OECD. But you may be surprised to hear that wind energy isn’t the most widely used renewable energy source in Denmark. First place actually belongs to bioenergy, followed by wind, solar and geothermal energy. Source: Denmark DK Green Light Green Light In the Danish “Svalin by Trekroner” co-housing community, researchers have developed colourful street lights, which show if the electricity comes from fossil fuels or sustainable sources, such as wind or solar power. Source: State of Green What Are Solar Trees?