Tony Ehinger provides five reasons to buy local food. Local food is fresher and tastes better since it's picked within 24 hours. It also helps preserve the regional economy and support farmers by allowing them to earn a fair price. Additionally, locally grown food is more nutritious since nutritional values decline after harvest. Buying locally also conserves energy by decreasing dependence on petroleum for long distance transportation. Finally, local farms protect the environment by preserving water sources, soil and promoting biodiversity.