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Suppose the price of a soda is $2 each, the price of a hot dog is $3 each and the budget is $20. If the marginal utility of the fourth soda is 100 and the marginal utility of the fourth hot dog is 150, to maximize utility, a person will buy
Atmosphere
The layer of gases surrounding a planet, crucial for supporting life on Earth, composed mainly of nitrogen, oxygen, argon, and carbon dioxide.
Fossil Fuels
Naturally occurring carbon-based fuels derived from the decomposed remains of ancient plants and animals, such as coal, oil, and natural gas.
Energy Pyramid
For an ecosystem, a graphic depicting the energy that flows through each trophic level in a given interval.
Trophic Level
The rank in the food chain of an organism, determined by the number of energy-transfer steps to that level.
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