id	keyword
fbem-31957	pollution
fbem-31957	development
fbem-31957	environmental
fbem-31957	spatial
fbem-31957	level
fbem-31957	carbon
fbem-31957	effect
fbem-31957	green
fbem-31957	china
fbem-31957	research
fbem-31957	governance
fbem-31957	emission