Some of the most common causes of deforestation are globalization, urbanization, overpopulation and climate. Trees are being cut down for construction purpose, lands are cleared for growing crops and trees are also used as firewood.
The word deforestation is used to describe the process of cutting down and burning the trees in forest and woodland and converting the land to other use. It also means that the nature of trees have changed, such as replacing slow growing native trees with fast growing woods which means that the precious eco-system of the forest into less bio-diverse ecosystems such as pasture, cropland, plantations and removal of rainforest. Forests still cover about 30 percent of the Earth's surface, but each year about 13 million hecters of forest (approximately 78,000square miles) are converted to agricultural land or cleared for other purposes.