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.
A biomass is also considered a renewable resource if used properly. Non-renewable Resources. Non-renewable resources are those natural resources which cannot be renewed once they are completely consumed. The resources which are replenished very slowly are also considered non-renewable resources.heir rate of production is very slow as compared to the rate of their extraction and consumption. Another example of a non-renewable resource is our lifetime. Once used up, any individual cannot get back lost time. Other good examples of non-renewable resources are; nuclear fuels, minerals, and shale.