Recent conservation efforts provide hope for the future of the country's biological diversity. In 1997, the government established the Ministry of the Environment and Natural Resources. A general environmental framework law was approved by the National Assembly in 1999. Several non-governmental organizations are doing work to safeguard some of the country's most important forested areas. Foremost among these is SalvaNatura, which manages El Impossible, the country's largest national park under an agreement with El Salvador's environmental authorities.