id	keyword
afs-72728	greenhouse
afs-72728	field
afs-72728	otc
afs-72728	temperatures
afs-72728	c02
afs-72728	air
afs-72728	finland
afs-72728	chambers
afs-72728	levels
afs-72728	ambient
afs-72728	agricultural
afs-72728	science
afs-72728	food