What causes deserts to expand?

Deserts expand due to processes like desertification, which is caused by climate change, deforestation, and unsustainable land use. Overgrazing and agriculture can deplete soil nutrients, making it less fertile and more prone to erosion. Rising global temperatures and reduced rainfall exacerbate these conditions, leading to the spread of arid environments. Desert expansion poses significant challenges to ecosystems and human livelihoods.