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Tshuva. Save Our Water. Digital image. Wikimedia. N.p., 2 Apr. 2014. Web. 2 Dec. 2015.
The image above is a logo produced by the State of California to encourage people to think extra carefully about their use of water.
Which of the following has most likely been a direct cause of this lack of water availability?
The growth in ownership of gasoline cars in the U.S.
Increased rainfall in Florida.
California farmers irrigating their crops.
The construction of dams throughout California.
The melting of Polar ice caps.