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.
But Obama said Iran's shattered economy needs to be rebuilt after years of sanctions â and it is their money. We're not writing Iran a check, he said. This is Iran's money that we were able to block from them having access to. It's very likely the bulk of the $100 billion will not even be sent back to Iran, says Elizabeth Rosenberg, who worked on the Iran sanctions issue at the Treasury Department and is now with the Center for a New American Security.