Changes in weather and climate will affect the cost of production for many agricultural products. For example,

in 2014 the Manchurian Plain in Northeastern China, which produces most of the country's wheat, corn, and

soybeans, experienced its most severe drought in 50 years. A drought decreases the supply of agricultural

products, which means that at any given price, a lower quantity will be supplied. Conversely, especially good

weather would shift the supply curve to the right.

When a firm discovers a new technology that allows the firm to produce at a lower cost, the supply curve will

shift to the right, as well. For instance, in the 1960s a major scientific effort nicknamed the Green Revolution

focused on breeding improved seeds for basic crops like wheat and rice. By the early 1990s, more than two-

thirds of the wheat and rice in low-income countries around the world used these Green Revolution seeds—and
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