In economics, “there is no such thing as a free lunch!” Even if we are not asked to pay money for something, scarce resources are used up in production and there is an opportunity cost involved.
Opportunity cost measures the cost of any choice in terms of the next best alternative foregone.
Making use of scarce farming land: The opportunity cost of using farmland to grow wheat for bio-fuel means that there is less wheat available for food production causing food prices to rise and increasing the risks of food poverty and malnutrition for millions of the world’s most vulnerable people
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