Why is olive oil so expensive?

Most of us have noticed the prices of our weekly food shopping going up over the last few years, but some items have risen by astronomical amounts.Extra virgin olive oil - a premium, unprocessed oil from the olive, has seen many customers' prices rise by 50% in the past year alone. We explain why, as we hear from oil sommeliers and the people who buy and sell the product.(Image: Olive oil being poured into a bowl. Credit: Getty Images)Presented and produced by Rick Kelsey