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Energy Ratios

Energy Ratios. ecological efficiency. A = P + R + U. C = P + R + U + F. Is what we eat efficient from an ecosystem perspective?. Should we eat large mammals? (cows?) Is it sustainable with population growth?. Average human  eats 3,000 Cal/day Beef must eat 30,000 Cal corn

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Energy Ratios

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  1. Energy Ratios ecological efficiency A = P + R + U C = P + R + U + F

  2. Is what we eat efficient from an ecosystem perspective? Should we eat large mammals? (cows?) Is it sustainable with population growth? • Average human  eats 3,000 Cal/day • Beef must eat 30,000 Cal corn • Corn needs 300,000 Cal Sunlight • 3.3ha produces enough corn to • feed one person if that person eats cows • Feed 10 people if they eat corn

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