BISMARCK, N.D., June 28, 2024 /PRNewswire/ -- MDU Resources Group, Inc. (NYSE: MDU) published its 2023 Sustainability Report today on its website at www.mdu.com/sustainability. MDU Resources marked 100 years in business on March 14, 2024. While the report outlines the company's practices and results for 2023, achieving 100 years in business underscores MDU Resources' long-term commitment to doing what's right for its stakeholders by balancing economic, environmental and social considerations to ensure relia ...