Complex sentence: Kuwait Programme on Development, Governance and Globalisation in the Gulf States each with an urban center comprising a significant proportion of the population, though all of them have several distinct settlements and a designated or "de facto" capital city.
Split into simpler sentences: Kuwait Programme on Development, Governance and Globalisation in the Gulf States each with an urban center comprising a significant proportion of the population. Notably however, all of them have several distinct settlements and a designated or "de facto" capital city.