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.
On 28 August 2014 Switzerland amended its sanctions to include the sanctions imposed by the EU in July. On 11 September 2014, US President Barack Obama said that the United States would join the EU in imposing tougher sanctions on Russia's financial, energy and defence sectors.