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.
Zoroastrian Dari (Persian: Ø¯Ø±Û Ø²Ø±ØªØ´ØªÛ or Ú¯ÙÛØ´ Ø¨ÙØ¯ÛÙØ§Ùââ lit. BehdÄ«nÄn dialect) is a Northwestern Iranian ethnolect spoken as a first language by an estimated 8,000 to 15,000 Zoroastrians in and around the cities of Yazd and Kerman in central Iran.