Composition of the Atmosphere extended definition. The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.
(CNN)Iran has completed the necessary steps in a deal to restrict its nuclear program, meaning international economic sanctions are lifted, officials from the EU and the U.N. nuclear watchdog agency said Saturday. Relations between Iran and the IAEA now enter a new phase.
In early 2015, the United States had comprehensive sanctions regimes on Burma (Myanmar), Cuba, Iran, Sudan, and Syria, as well as more than a dozen other programs targeting individuals and entities pertaining to certain political crises or suspected of certain types of criminal behavior, such as narcotics trafficking.