Ahvaz
The seat of the province has, for the most of its history, been in its northern reaches, first at Susa (Shush) and then at Shushtar. During a short spell in the Sasanian era, the capital of the province was moved to its geographical center, where the river town of Hormuz-Ardashir (modern Ahvaz). However, later in the Sasanian time and throughout the Islamic era, the provincial seat returned and stayed at Shushtar, until the late Qajar period. With the increase in the international sea commerce arriving on the shores of Khuzestan, Ahvaz became a more suitable location for the provincial capital. The River Karun is navigable all the way to Ahvaz (above which, the Karun flows through rapids). The town was thus refurbished by the order of the Qajar king, Naser al-Din Shah and renamed after him, Nâseri. Shushtar quickly declined, while Ahvaz/Nâseri prospered to the present day.
Ahvaz
In 2011, the World Health Organization ranked Ahvaz as the world's most air-polluted city. The reason Ahvaz is so polluted is because of its oil industry. The pollution can be very dangerous, causing different types of diseases and harmful to plants.Traditionally, Khuzestan province has been a major soccer hub in Iran. The city has two existing sport complexes: Takhti Stadium and the newly constructed Ghadir Stadium. There are several other smaller complexes for martial arts, swimming pools and gymnasiums. Also, a new privately owned stadium is currently under construction by Foolad F.C. in Ahvaz.