id	keyword
fbem-25527	green
fbem-25527	development
fbem-25527	economy development
fbem-25527	efficiency
fbem-25527	development efficiency
fbem-25527	economic
fbem-25527	level
fbem-25527	region
fbem-25527	cities
fbem-25527	research
fbem-25527	china
fbem-25527	investment
fbem-25527	output
fbem-25527	impact