We use a lot of energy from gas and other sources in order to make the food we eat. As this diagram illustrates, it take over 3,000 calories of energy to produce one can of corn. That corn offers the body only 375 calories of food energy. Other examples:
- " Breakfast cereals, which contain about 3600 kcal of food energy per kilogram, require on average 15,675 kcal/kg to process and prepare."
- " A 12-ounce can of diet soda requires a total of 2200 kcal to produce (over 70% of which goes toward the aluminum can) and may provide only 1 kcal in food energy.
Source: Martin C. Heller and Gregory A. Keoleian, "Life Cycle-Based Sustainability Indicators for Assessment of the U.S. Food System", Center for Sustainable Systems, U. of Michigan, Report No. CSS00-04, December 6, 2000
We use a lot of energy from gas and other sources in order to make the food we eat. As this diagram illustrates, it take over 3,000 calories of energy to produce one can of corn. That corn offers the body only 375 calories of food energy. Other examples:
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