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Officials at Cedar Grove Composting say it has spent hundreds of thousands of dollars to get rid of the smell from its Smith Island plant and downwind residents should notice the difference once the warm weather starts.

Yard and food waste from throughout Snohomish County and North King County is trucked to the plant between Everett and Marysville, where it is turned into compost. Last summer, however, an odor from the plant began to overwhelm much of the area.

The Puget Sound Clean Air Agency ordered Cedar Grove to get rid of the stench. Company officials say they have taken a number of steps, including planting 500 trees to absorb odors and act as a windbreak.