By Alastair Leithead BBC News, Los Angeles
While historic winter storms have battered much of the US, California is suffering its worst drought on record. So why is America's most valuable farming state using billions of gallons of water to grow hay - specifically alfalfa - which is then shipped to China?
The reservoirs of California are just a fraction of capacity amid the worst drought in the state's history.
"This should be like Eden right now," farmer John Dofflemyer says, looking out over a brutally dry, brown valley as his remaining cows feed on the hay he's had to buy in to keep them healthy.
In the dried-up fields of California's Central Valley, farmers like Dofflemyer …show more content…
It's enough for a year's supply for a million families - it's a lot of water, particularly when you're looking at the dreadful drought throughout the south-west."
Manuel Ramirez from K&M Press is an exporter in the Imperial Valley, and his barns are full of hay to be compressed, plastic-wrapped, packed directly into containers and driven straight to port where they are shipped to Asia and the Middle East.
"The last few years there has been an increase in exports to China. We started five years back and the demand for alfalfa hay has increased," he says.
"It's cost effective. We have abundance of water here which allows us to grow hay for the foreign market."
Cheap water rights and America's trade imbalance with China make this not just viable, but profitable.
"We have more imports than exports so a lot of the steamship lines are looking to take something back," Glennon says. "And hay is one of the products which they take back."
It's now cheaper to send alfalfa from LA to Beijing than it is to send it from the Imperial Valley to the Central Valley.
"We need to treat the resource as finite, which it is," he says. "Instead, most of us in the states, we think of water like the air, it's infinite and inexhaustible, when for all practical purposes it's finite and it's