{"charts":[{"slug":"co2","title":"Carbon dioxide","description":"Annual atmospheric concentration of carbon dioxide from WDCGG.","category":["Greenhouse gases"],"unit":"ppm","frequency":"annual","tags":["greenhouse-gases","carbon-dioxide","co2","concentration"],"source":"WDCGG","chart_type":"line"},{"slug":"ch4","title":"Methane","description":"Annual atmospheric concentration of methane from WDCGG.","category":["Greenhouse gases"],"unit":"ppb","frequency":"annual","tags":["greenhouse-gases","methane","ch4","concentration"],"source":"WDCGG","chart_type":"line-with-uncertainty"},{"slug":"n2o","title":"Nitrous Oxide","description":"Annual atmospheric concentration of nitrous oxide from WDCGG.","category":["Greenhouse gases"],"unit":"ppb","frequency":"annual","tags":["greenhouse-gases","nitrous-oxide","n2o","concentration"],"source":"WDCGG","chart_type":"line"},{"slug":"co2-growth-rate","title":"Carbon dioxide growth rate","description":"Annual growth rate of atmospheric carbon dioxide 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