The region of Europe that has a semi-arid climate is the Iberian Peninsula, specifically the south-eastern part of Spain and the south of Portugal.

Here's why:

* Low rainfall: This region receives less than 500mm of rainfall per year, a defining characteristic of semi-arid climates.

* High temperatures: Summers are hot and dry, often exceeding 30°C, with long periods of sunshine.

* Dry, dusty conditions: The lack of rainfall leads to dry, dusty conditions, especially in the summer months.

* Sparse vegetation: The vegetation is adapted to the dry conditions, with drought-resistant shrubs and grasses being prevalent.

While the majority of Europe experiences a temperate climate, this specific region on the Iberian Peninsula stands out with its semi-arid characteristics.