Takes longer to cook at higher altitudes. Cleaning agents help water by lowering the surface tension. The ph of water can affect color, mushiness and flavor. Hard water contains calcium and that keeps them hard. Use soft water if your beans never seem to get done.
Hard water gives an alkaline cooking medium which affects color of foods, especially vegetables.
Carbon, hydrogen and oxygen make up carbohydrates. Carbohydrates in plants are formed by photosynthesis. Carbohydrate foods include cereal grains, legumes, and starchy roots and tubers. Also, fruits, sugars, honey, molasses, syrups, candy, jelly and jam, flours, dried fruits. Many complex carbs. including starch have glucose as basic sugar unit.