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' Water: The body is approximately 60% water, give or take. There are many different opinions about how much water we should be drinking every single day. The health authorities commonly recommend eight 8-ounce glasses, which equals about 2 liters, or half a gallon. This is called the 8??8 rule and is quite simple to consider. However, there are additional health gurus who think we have been always about the brink of dehydration therefore we need to sip on water constantly the whole day. Many of the processes inside you rely heavily on water, so it is important that you get motor this essential nutrient in what you eat. The practical options for energy range from the standard fuels, natural gas, petroleum (or oil), and coal. Fossil fuels are referred to as nonrenewable energy sources because, once used, they are gone. Scientists are exploring the practicality of other sources called renewable energizes. These include sun, wind, geothermal, water, and biomass. The renewable power resources are very important in long range energy planning simply because they will not be depleted.