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.
Sanctions were approved by the United States, the European Union (EU) and other countries and international organisations. Russia has responded with sanctions against a number of countries, including a total ban on food imports from the EU, United States, Norway, Canada and Australia. The sanctions have contributed to the collapse of the Russian ruble and the Russian financial crisis (2014âpresent). They have also caused economic damage to a number of EU countries, with the total losses estimated at â¬100 billion.