Prime objective of this lecture is to present on Deforestation. Deforestation is the permanent destruction of forests in order to make the land available for other uses. Some common causes of Deforestation are: Burning the timber increases the level of carbon dioxide in the air; Less trees means less carbon dioxide absorbed for photosynthesis; Soil is eroded as it is exposed to the wind and rain; Less water is transpired into the atmosphere and Many animal and plant habitats are destroyed causing extinction of species.