On March 25, residents of Sunnyside, Washington traveled roughly 35 miles to speak at a public hearing in Yakima, Washington about a manure-to-energy project they said could reshape their daily lives. At the Yakima Regional Clean Air Agency, they approached the microphone one by one, some speaking in Spanish, and asked regulators to stop or delay the construction of a facility that would turn cattle manure into renewable natural gas. If their ap…