Vatican City issues its own coins. It has used the euro as its currency since 1 January 1999, owing to a special agreement with the European Union (council decision 1999/98). Euro coins and notes were introduced on 1 January 2002âthe Vatican does not issue euro banknotes.
Carbon in the earth's atmosphere exists in two main forms: carbon dioxide and methane. Both of these gases absorb and retain heat in the atmosphere and are partially responsible for the greenhouse effect.arbon in the earth's atmosphere exists in two main forms: carbon dioxide and methane. Both of these gases absorb and retain heat in the atmosphere and are partially responsible for the greenhouse effect.
Carbon is found in the Earthâs atmosphere in the form of carbon dioxide (CO2). Although it only makes up a small percentage of the atmosphere it plays an important role, including being used by plants during photosynthesis. Carbon monoxide (CO) is very toxic to both humans and animals.