. "" . "SDN:P07::CF12N701" . "SDN:P07::CF12N701" . "SDN:P07::CF12N701" . . "2009-07-06 15:41:29.0" . . . . . "2009-07-06 15:41:29.0" . "1" . "false" . . "tendency_of_atmosphere_moles_of_ethene"@en . "accepted"@en . "1" . . "\"tendency_of_X\" means derivative of X with respect to time. The construction \"atmosphere_moles_of_X\" means the total number of moles of X in the entire atmosphere, i.e. summed over the atmospheric column and over the entire globe. The chemical formula for ethene is C2H4. Ethene is a member of the group of hydrocarbons known as alkenes. There are standard names for the alkene group as well as for some of the individual species."@en .