California is considering a pilot program to mix hydrogen into existing gas infrastructure, a move supporters say could cut emissions while critics warn it may pose health, safety and transparency risks, particularly for low-income communities.Mechanical Engineering Assistant Professor Alejandra Hormaza Mejia, a renewable energy expert, says blending small amounts of hydrogen into natural gas pipelines could help reduce climate pollution, but cautions that more real-world testing is needed to fully understand safety and system impacts.

This article was originally published by Associated Press on January 12, 2026,