Why would one side of a mountain have a different climate change

Mountains have leeward sides and windward sides and the climate is different in different sides because by the time the air gets to the leeward side of the mountain it has already lost some of its moisture which is causing different climate condition on the same mountain.

Many of the deserts of the world are formed because of the lack of moisture blocked by the mountains.

the minoan civilization flourished in the middle bronze age on the island of crete located in the eastern mediterranean from c. 2000 bce until c. 1500 bce. with their unique art and architecture, and the spread of their ideas through contact with other cultures across the aegean, the minoans made a significant contribution to the development of western european civilization as it is known today. labyrinth-like palace complexes, vivid frescoes depicting scenes such as bull-leaping and processions, fine gold jewelry, elegant stone vases, and pottery with vibrant decorations of marine life are all particular features of minoan crete.  

so basically their unique way of ding arts, as well as architecture.

uhh idk for sure but i think it makes it difficult to pump the oil through the oil rigs