id	keyword
cjel-5474	energy
cjel-5474	tobin
cjel-5474	environmental
cjel-5474	coal
cjel-5474	book
cjel-5474	air
cjel-5474	law
cjel-5474	author
cjel-5474	oil
cjel-5474	pollution
cjel-5474	conservation
cjel-5474	epa
cjel-5474	sulfur
cjel-5474	chapter
cjel-5474	research