id	keyword
cet-14430	waste
cet-14430	msw
cet-14430	content
cet-14430	food
cet-14430	ash
cet-14430	analysis
cet-14430	textiles
cet-14430	management
cet-14430	energy
cet-14430	plastics
cet-14430	south
cet-14430	africa