Reports by the Congressional Research Service from 2008 discuss emerging policy issues regarding carbon dioxide pipelines for carbon sequestration, network needs and cost uncertainties regarding pipelines for carbon dioxide control, and jurisdictional issues in regulating carbon dioxide sequestration pipelines.
Total numbers of speakers is high: over 40 million Farsi speakers (about 60% of Iran's population); over 14 million Dari Persian speakers in Afghanistan (50% of the population according to CIA World FactBook & Britannica); and about 2 million Dari Persian speakers in Pakistan.
Persian is a West Iranian language of the Indo-European family of languages and is spoken in those parts of Iran where the Fars people, Persians, dwell, as well as in the Republic of Tajikistan. Tehran, Isfahan, Fars, Khorasan, Kerman and Yazd are some of the provinces inhabited by the Persians.here are a number of other national and ethnic groups living in various parts of Iran. The historical background and anthropological origin of these groups have been subject of numerous research works, but researchers are not unanimous concerning many of the questions posed.