Bornholm, Baltic Sea, Denmark

🇩🇰 Bornholm is a Danish island in the Baltic Sea, to the east of the rest of Denmark, south of Sweden, north-east of Germany and north of Poland. The Largest settlement is Rønne. Among Bornholm's chief industrial activities are dairy farming and arts and crafts industries such as glass production and pottery using locally worked clay. Tourism is also important during the summer months. The island is home to many of Denmark's round churches.

The island is known as solskinsøen (Sunshine Island) because of its weather and klippeøen (Rock Island) because of its geology, which consists of granite, except along the southern coast. The heat from the summer is stored in the rock formations and the weather is quite warm until October. As a result of the climate, a local variety of the common fig, known as Bornholm's Diamond, can grow locally on the island. The island's topography consists of dramatic rock formations in the north (unlike the rest of Denmark, which is mostly gentle rolling hills) sloping down towards pine and deciduous forests (greatly affected by storms in the 1950s), farmland in the middle and sandy beaches in the south.

Strategically located in the Baltic Sea, Bornholm has been fought over for centuries. It has usually been ruled by Denmark, but also by Sweden and Lübeck, Germany. The ruin of Hammershus, at the north-western tip of the island, is the largest medieval fortress in northern Europe, testament to the importance of its location. This island and Ertholmene is what remains in Denmark of Skåneland east of Øresund, having been surrendered to Sweden in 1658 but with Bornholm after a local revolt later regained in 1660.

Economy Jensen-Group, an industrial washing and folding machine company, was founded on the island and has a factory in Rønne. It is headquartered in Belgium.

Electricity supply Bornholm is connected to the Swedish electricity grid by a submarine 60 kV AC cable, which is among the longest AC cables in Europe. This cable is capable of delivering all the electrical energy consumed on Bornholm. However Bornholm also generates its own electricity at small thermal power plants and especially wind turbines.

Bornholm is also home to a large internationally funded demonstration project to test the viability of novel energy market mechanisms to regulate energy networks with a high prevalence of renewables (such as wind turbines and photovoltaics). 50% of the EcoGrid project is EU-funded, with the remainder coming mainly from large corporations.