id	keyword
american_scientific_journal-3134	energy
american_scientific_journal-3134	co2
american_scientific_journal-3134	ssi
american_scientific_journal-3134	emissions
american_scientific_journal-3134	correlation
american_scientific_journal-3134	indexes
american_scientific_journal-3134	countries
american_scientific_journal-3134	ccpi
american_scientific_journal-3134	gdp
american_scientific_journal-3134	epi