Also known as clearfelling, clearcutting is a logging technique in which all trees are removed from an area, typically 20 acres or larger, with little regard for long-term forest health. Clearcutting is controversial, but logging companies and forest-workers in some countries still practice it. Environmental advocates see no difference between clearcutting and deforestation. The practice is considered destructive to natural habitats and wildlife, and a contributor to global warming.