市场消息：挪威国家石油公司在丹麦的首个太阳能发电厂已开始投产。

Group 1 - The core point of the article is that Norway's national oil company has commenced operations at its first solar power plant in Denmark [1] Group 2 - The solar power plant marks a significant step for the company in diversifying its energy portfolio [1] - This initiative aligns with the industry's broader trend towards renewable energy sources [1]