Hardwoods come from broad-leaved trees, usually (but not always) deciduous. They are typically (but, again, there are exceptions) denser than softwoods, which come from coniferous trees. Because hardwoods are generally more resilient than softwoods, they are commonly used for making furniture and flooring, and in construction, particularly for exterior work. The use of tropical hardwoods is a contributor to deforestation, linked to climate change and reduced biodiversity.