co2 = [
["US", await FileAttachment("US_Transport@1.csv").csv({typed: true})],
["NZL", await FileAttachment("NewZeland_Transport.csv").csv({typed: true})],
["CHN", await FileAttachment("China_Transport.csv").csv({typed: true})],
["RUS", await FileAttachment("Russia_Transport.csv").csv({typed: true=
["IND", await FileAttachment("India_Transport.csv").csv({typed: true})],
["MEX", await FileAttachment("Mexico_Transport.csv").csv({typed: true})],
["FRA", await FileAttachment("France_Transport.csv").csv({typed: true})],
["CAN", await FileAttachment("Canada_Tranport@1.csv").csv({typed: true})]
].flatMap(([Symbol, values]) => values.map(d => ({Symbol, ...d})))