Dairy products, while high in calcium, are low in magnesium. Green vegetables are high in magnesium. 1  A Quick and Essential Guide to Choosing Nutrient-Dense Foods For good overall health and disease prevention, a diet including a large variety of nutrient-dense foods is critical.-2 cups or 5-6 ounces of these fish, with or without bones, are enough to provide up to 300 mg of calcium. You can also buy canned salmon and enjoy a healthy meal full of nutrients.   The last of our 3 food sources of calcium is calcium fortified orange juice.
Non-renewable energy resource: an energy resource that is not replaced or is replaced only very slowly by natural processes. Primary examples of non-renewable energy resources are the fossil fuels --oil, natural gas, and coal.
Renewable resources of energy are resources of energy that we will never run out of because eg they can be recycled or come from a material that we will always have. Renewable â¦ resources of energy is energy that comes from fuels that are renewable. A few examples of non-renewable fuels are oil, coal, and rainforest timber And examples of renewable resources of energy are wind, hydro and solar.