Real estate law deals with all legal issues concerning real property, including real estate transactions, financing, development, and regulation. Legal work in this area often involves business and tax law issues. Real estate lawyers also may deal with natural resource and environmental issues. Some lawyers practice real estate law exclusively, but often real estate practice is part of a broader practice that may include tax, estate planning, environmental law, and commercial law. Many companies have in-house real estate lawyers, such as large developers, retailers, and other property owners, banks and other lenders, and title insurers. Many public-interest entities, such as environmental and conservation organizations, also employ real estate lawyers. Real estate lawyers also work in all levels of government, representing the government as landowner as well as dealing with land-use planning and regulation, eminent domain, and public finance.