WILLMAR—A proposal to grow fresh lettuce and herbs year-round with nothing more than air, light and a fine mist of water and nutrients was presented last month to a local ag-based committee that is more familiar with growing crops in soil. Aeroponics, which involves growing plants by having roots exposed to oxygen and fed with a mist of water, could be an answer to consumers who want locally grown product and an answer to an entrepreneur looking for a new business, said Dana Anderson, CEO of Living