id	keyword
cet-15016	green
cet-15016	transportation
cet-15016	vehicles
cet-15016	knowledge
cet-15016	malaysia
cet-15016	perception
cet-15016	research
cet-15016	public
cet-15016	awareness
cet-15016	electric
cet-15016	cost
cet-15016	thailand