Jose Francisco Mari, 48, dries 'chufas' (tiger nuts) on the roof of his house on January 18, 2016 in Valencia, Spain. According to the Valencia's Tiger Nut Regulatory Council, the cultivation of 'chufa' (tiger nuts) is living its golden years, in part due to its popularity fuelled by followers of the fashionable Paleo Diet. Some celebrities such as Miley Cyrus, Uma Thurman and Matthew McConaughey are known to be users of the Paleo Diet. An Oxford study published in January 2014 concluded that a human ancient ancestor nicknamed 'Nutcracker' who lived in East Africa between 2.4 million and 1.4 million years ago survived mainly on a diet of tiger nuts. Tiger nuts are farmed in 19 towns surrounding the Spanish eastern city of Valencia, being the only area of Europe where 'chufa' (tiger nut) is grown for centuries. Tiger nuts grown in Valencia are mainly used to make a popular drink named 'Horchata', but farmers have seen how prices and demand for tiger nuts have increased as they are being considered a so-called super food, high in iron, potassium and Vitamins C and E. Photo Credit: David Ramos / Getty Images.
Greek farmers close Tempi intersection to traffic for 2 hours with their tractors during a protest against government's decision of increasing tax in the agriculture sector, in Thessaly, Greece on January 23, 2016. Photo Credit: Anadolu Agency / Getty Images.
Palestinian employees collect onions as they work on agricultural land belonging to settlers from the Almog settlement in the Israeli occupied West Bank, near the Palestinian city of Jericho in the Jordan Valley on January 21, 2016. Israel is moving to declare 150 hectares in the occupied West Bank as state land in what would be the largest such seizure since 2014. The farmland is located in the Jordan Valley south of Jericho and, according to a settlement watchdog, would mark the biggest declaration since a seizure of 400 hectares in 2014. Photo credit: AFP / MENAHEM KAHANA / Getty Images.
Palestinian street vendor sells cauliflower on the side of a road near the West Bank city of Hebron on January 18, 2016. Photo credit: AFP / MENAHEM KAHANA / Getty Images.
A Pakistani farmer prepares to make traditional jaggery at a sugarcane field on the outskirts of Peshawar on January 18, 2016. Photo credit: AFP / A Majeed / Getty Images.
Uruguayan dairy producers protest along Route 1 in the department of San Jose, Uruguay, on January 19, 2016. Dairy producers and farmers Tuesday protested in 10 out of the 19 departments in Uruguay against the tax raise and the unpaid debt they are owed by Venezuela. Photo credit: AFP / MIGUEL ROJO / Getty Images.
French farmers, including Breton farmers from the Ille-et-Vilaine department, protest in front of the Brittany prefecture (Prefecture de Bretagne) in Rennes early on January 22, 2016, against falling prices of dairy and meat products. Farmers protests that started on January 20 in the Cotes d'Armor extended to the West, particularly in Rennes where breeders from the Ille-et-Vilaine department came at dawn shout their distress at the prefecture. Photo credit: AFP / LOIC VENANCE / Getty Images.
In this photo taken on January 19, 2016, a woman roasts coffee beans in a pan at the Satria coffee plantation near Bangli, central Bali. Indonesia is the fourth largest producer of coffee in the world. Photo credit: AFP / DAVID GANNON / Getty Images.
In this photograph taken on January 19, 2016, farmers plant rice in paddy fields near Bangli, central Bali. Photo credit: AFP / DAVID GANNON / Getty Images.