Deforestation is the clearing of forests to make way for agriculture, logging, mining, dams, and roads. It has harmful effects by disrupting water and carbon cycles, reducing biodiversity, and causing soil erosion and poor water quality. The leading cause is agriculture as farmers clear land for crops and livestock. Logging and mining also contribute by cutting down trees for wood and extracting resources. Building dams and roads enables further deforestation by providing access to more forest areas. The Amazon and forests in Africa and Southeast Asia have faced significant deforestation, reducing habitats for many species. Individual actions like sustainable consumption and donations can help combat deforestation.