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.
Non-Renewable Energy. Non-renewable fossil fuels (crude oil, natural gas, coal, oil shales and tar sands) currently supply Australia with more than 95 percent of our electrical energy needs. Non-renewable energy is energy produced by burning fossil fuels such as coal.They are non-renewable because there are finite resources of fossil fuels on the planet. If they are continually used, one day they will run out.here are a few major advantages with non-renewable energy. Fossil fuels, such as coal, oil and gas are abundant in Australia so this means they are a relatively cheap fuel and readily available. Australia has enough fossil fuel resources to last for hundreds of years.