id	keyword
ejpam-4614	energy
ejpam-4614	consumption
ejpam-4614	emissions
ejpam-4614	co2
ejpam-4614	cluster
ejpam-4614	countries
ejpam-4614	low
ejpam-4614	energy consumption
ejpam-4614	data
ejpam-4614	gdp
ejpam-4614	regression
ejpam-4614	medium