"The winds blow and they blow in different directions and the ash will spread throughout the county," said Kathy Marshall, who lives in Ada County.
Dynamis says it would burn enough trash to generate electricity to power 2,200 homes per day. Leaders at the company say they follow all state and federal guidelines.
Thursday's meeting was held by the Ada County Planning and Zoning Commission. It is the first meeting allowing residents to share their thoughts on the project. Even though the commission can't changed the plan they can give recommendations to Ada County Commissioners.
Planning and Zoning members did vote 6-1 in favor of recommending that the process be slowed down and more public hearings are scheduled to discuss Dynamis.