A Palestinian farmer sorts olives during harvest in the West Bank village of Awarta near Nablus October 11, 2014. (Photo by Abed Omar Qusini/Reuters)

A olive tree is seen in a field in the outskirts of Ronda, near Malaga, April 9, 2014. (Photo by Jon Nazca/Reuters)

A villager rests while harvesting olives in Anqoun town, south Lebanon October 19, 2014. (Photo by Ali Hashisho/Reuters)

A worker inspects olive paste as it is being pressed to extract oil at an olive press in Anqoun town, south Lebanon October 19, 2014. (Photo by Ali Hashisho/Reuters)

A man uses nets to harvest olives under olive trees near the village of Castagniers, north of Nice, December 5, 2013. (Photo by Eric Gaillard/Reuters)

Olives are seen in an olive tree field in La Rinconada, near the Andalusian capital of Seville September 24, 2012. (Photo by Marcelo del Pozo/Reuters)

A man works in a traditional olive-oil mill near Chefchaouen, Northern Morocco photo taken February 2007. (Photo by Rafael Marchante/Reuters)

A worker empties out olives from a basket at an olive tree field in La Rinconada, near the Andalusian capital of Seville September 24, 2012. (Photo by Marcelo del Pozo/Reuters)

Workers place olive paste on an olive press before they extract oil from it in Anqoun town, south Lebanon October 19, 2014. (Photo by Ali Hashisho/Reuters)

A laborer from the Berber Kabylie region harvests olives in the eastern village of Tazmelt, near Bejaia, Algeria January 13, 2014. (Photo by Louafi Larbi/Reuters)

Olives are seen at an oil mill in Lun, south Croatia, November 6, 2013. (Photo by Antonio Bronic/Reuters)

Palestinians harvest olives near the West Bank city of Nablus, October 11, 2014. (Photo by Finbarr O'Reilly/Reuters)

Multi-colored nets used to harvest olives are spread out under olive trees near the village of Castagniers, north of Nice, December 5, 2013. (Photo by Eric Gaillard/Reuters)

A Palestinian man pours freshly pressed olive oil during harvest season in the village of Qarawat Bani Zeid, north of the West Bank city of Ramallah October 25, 2011. (Photo by Darren Whiteside/Reuters)

A plow is seen next to olive trees in a field in the outskirts of Cuevas del Becerro, near Malaga, April 9, 2014. (Photo by Jon Nazca/Reuters)

A veil-clad female worker walks in a factory for pickling olives, dates, jam productions and olive oil in the Saudi city of Tabuk August 22, 2013. (Photo by Mohamed Al Hwaity/Reuters)

Palestinians harvest olives near the West Bank city of Nablus, October 11, 2014. (Photo by Finbarr O'Reilly/Reuters)

An olive tree field is seen in the outskirts of Teba, near Malaga, April 9, 2014. (Photo by Jon Nazca/Reuters)

Bottles of olive oil are lined in a factory in Dos Hermanas, near the Andalusian capital of Seville September 21, 2012. (Photo by Marcelo del Pozo/Reuters)

A basket of olives sits in an olive tree field in La Rinconada, near the Andalusian capital of Seville September 24, 2012. (Photo by Marcelo del Pozo/Reuters)