The Mediterranean basin has a better climate for producing olive oil.
Spain, Portugal, Italy, Greece, Turkey, Tunisia and Morocco all have sunny, warm and dry climates, which help to produce olive trees and olive groves. Olive groves cannot be grown anywhere, especially not in countries like Belgium or the United Kingdom where the weather is mild, rainy and with a lack of sun or in a climate like Norway, where there is also little sun and is a relatively cold country. In countries like these, it is harder to grow vegetables and fruits which require sun, but easier to grow produce that are considered root vegetables or fruits.