The carbon budget looks to be one of the most critical single metrics for keeping planet Earth a safe place to live through the coming century. (e360.yale.edu)
From Ryan Maue of FSU comes accumulated cyclonic energy, the best single metric of the strength of hurricane seasons: (climate-skeptic.com)
Calculate how much value we subtract from the human condition when we reduce learning to single metrics of limited validity. (carnegieknowledgenetwork.org)