Topic: Pliocene

Tumbleweed rolls across a dried out landscape in central California's Kern County as trucks head south toward the Grapevine to begin the climb over the Tejon Pass leading into Southern California, on February 3, 2014. The United States government announced on February 5 a new system of regional hubs to tackle the effects of climate change as the country's southwest battles a historic drought. In January, California declared a state of emergency due to what could be the worst drought in a century for the state, and which has prompted fears of lost harvests and devastating forest fires. (FREDERIC J. BROWN/AFP via Getty Images)

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Nathanael Johnson - Grist