id	keyword
american_scientific_journal-11470	energy
american_scientific_journal-11470	power
american_scientific_journal-11470	carbon
american_scientific_journal-11470	technology
american_scientific_journal-11470	solar
american_scientific_journal-11470	sources
american_scientific_journal-11470	railways
american_scientific_journal-11470	indian
american_scientific_journal-11470	emissions
american_scientific_journal-11470	research
american_scientific_journal-11470	wind
american_scientific_journal-11470	green
american_scientific_journal-11470	electrification
american_scientific_journal-11470	paper
american_scientific_journal-11470	engineering
american_scientific_journal-11470	hydrogen
american_scientific_journal-11470	journal
american_scientific_journal-11470	sciences