Semi-arid climate regions receive low annual precipitation and intermediates between the desert climates and humid climates in ecological characteristics and agricultural potential. Semi-arid climates tend to provide scrubby vegetations in regions where they exist. There are two variations of the semi-arid climate, a hot semi-arid climate and a cold semi-arid climate. This book presents topical research data in the study of semi-arid environments, including the semi-arid environments of the El Melah Lagoon in Tunisia; improving reproductive outputs of small ruminants reared in semi-arid environments; the presence of cyanobacterial soil crusts in semi-arid ecosystems is associated with an increase in carbon and nitrogen sequestration; semi-arid vegetation in Brazil; and the semi-arid zone afforestation in northern Israel.