id	keyword
aijhass-254	pakistan
aijhass-254	air
aijhass-254	environmental
aijhass-254	heat
aijhass-254	pollution
aijhass-254	climate
aijhass-254	change
aijhass-254	journal
aijhass-254	study
aijhass-254	research
aijhass-254	wave