King Frederik X of Denmark (C) and Netherlands' King Willem-Alexander (L) arrive to a conference at the Danish Industry (DI) in Copenhagen, Denmark, on November 12, 2024, under the topic "Cooperation on the development of the hydrogen offshore and onshore infrastructure and green hydrogen to supply the Northwestern European market". The purpose of the king's visit is to strengthen cooperation between the Netherlands, Denmark, and Norway in hydrogen technology and future energy systems. After his visit to Denmark, the Dutch king will continue to Norway. (Photo by Ida Marie Odgaard / Ritzau Scanpix / AFP) / Denmark OUT (Photo by IDA MARIE ODGAARD/Ritzau Scanpix/AFP via Getty Images)