A region is arid when it is characterized by a severe lack of available water, to the extent of hindering or preventing the growth and development of plant and animal life. Environments subject to arid climates tend to lack vegetation and are called xeric or desertic.

The expression 'available water' refers to water in the soil in excess to the wilting point. The air over a hot desert may actually contain substantial amounts of water vapor but that water may not be generally accessible to plants, except for very specialized organisms (such as some species of lichen). 'Lack of water' refers to use by plants. The water that is actually present in the environment may be sufficient for some species or usages (such as climax vegetation), and grossly insufficient for others. Aridity, the characteristic nature of an arid climate, may thus depend on the use of the land. Regards to the presence of life, what is more important than the degree of rainfall is the fraction of precipitation that is not quickly lost through evaporation or runoff. Attempts to quantitatively describe the degree of aridity of a place has often led to the development of aridity indexes. There is no universal agreement on the precise boundaries between classes such as 'hyper-arid', 'arid', 'semi-arid', etc.

Mohamad Bash (Arabic: محمد باش) is a Syrian Singer from Damascus, Syria.

Mohamad Bash was born in Damascus, Syria on November 6, 1982. “Bash”, as his fans like to call him was raised in Damascus to a Syrian father and a Jordanian mother. His family consists of him, his parents and three sisters. Bash Family owns and manages a boutique hotel and restaurant called "Baik Bash" in Old Damascus.

Bash’s interest for music started at the age of 14 when he started piano lessons and music theory. He then abandoned music due to his studies but went back to it this time while teaching himself to play the keyboard. His love for guitar, the musical instrument he is now known for never being without, started at the age of 20 when he started his first official guitar lessons where he then formed a band with his instructor.

Bash’s rise to fame was in 2009 when he got accepted to reality TV talent show Star Academy Arab World, the sixth season. Star Academy is a reality singing show consisting of 20 students from all over the Middle East competing for one dream, the dream of becoming a star. Bash was the only Syrian contestant that season and managed to stay as far as right before the semi-finals. During his stay in the academy, he performed different genres of songs which helped show his diversity and ability to adapt to different kinds of songs and performances including dance.