Principle 1 Eat
Eat five fresh fruits and vegetables a day, or more.
Eating any combination of five fruits and vegetables (or more) creates a higher percent of your daily calories being healthy calories.

If you concentrate on eating real, whole, and healthy foods first, there is less room for processed empty calories, refined sugars, and cheap meats (base your diet on a 2000 calorie diet). Whole unprocessed foods in their most natural state are how nutrition was intended by the creator who provided for us.
Antioxidants, dietary fiber, and other nutrients are removed when whole foods are over processed.
Trusting the creator, eating foods in the most natural state, will help us navigate through the diet industry madness we currently live in. Eating more like our great-grandparents from the garden, is wise counsel.
Local, organic, and seasonal foods use a fraction of the fossil fuels as processed conventional foods. Meat requires at least 4 times the natural resources per pound to produce than fruits, vegetables, beans, or whole grains. Local seasonal foods are not transported long distances. Organic foods do not use pesticides, insecticides, and fertilizers that conventional farming uses (which not only require fossil fuels to create, but also destroy bio-diversity). The less processed the food, the less garbage produced. If we learn to drink tap water again, we can reduce the need for foreign oil completely, by reducing the billions of plastic, glass, and aluminum single-use containers we produce.
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Eating from the garden, composting our clippings and peelings, and recycling everything possible; theoretically, we can reduce our waste by 90%. Also, buying Fair-Trade goods will improve the living conditions of farmers in poverty around the world. Reward the companies who are good to their workers and the planet by your purchases. Care for your neighbor; green the planet; get healthy, and save the world; all with your personal consumption.