More and more people are eating organic food. Once derided as a hippie fad, today organic is the fastest growing segment of the United States food industry with consumer demand increasing by nearly 20 percent each year. No longer confined to natural food stores, organic food is now on supermarket shelves, served in restaurants and fast food chains, and even sold at national parks and major league baseball stadiums. Many schools and colleges, such as Yale and Stanford, now serve organic food to their students. People are choosing organic because they want a healthier and safer alternative to ''conventional''food with its use of toxic pesticides, antibiotics, hormones, and genetic engineering. The Organic Food Handbook examines this important trend and provides a concise, simple guide to eating and buying organic food.