id	keyword
american_scientific_journal-5502	energy
american_scientific_journal-5502	tourism
american_scientific_journal-5502	crete
american_scientific_journal-5502	solar
american_scientific_journal-5502	hotels
american_scientific_journal-5502	technologies
american_scientific_journal-5502	industry
american_scientific_journal-5502	energies
american_scientific_journal-5502	heat
american_scientific_journal-5502	island
american_scientific_journal-5502	systems