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.
There are about 200 languages that have a million or more native speakers. Mandarin Chinese is the most common, being spoken by around 874,000,000 people as a native language. English is a distant third with approximately 341,000,000 native speakers.ote: If the 15 major variants of Arabic are considered one language, Arabic is the 6th most common language in the world having 198-201,000,000 native speakers with substantial numbers in at least 46 countries. Source: Ethnologue Volume I: Languages of the World, 14th ed. (2000).