id	keyword
ajceb-7239	energy
ajceb-7239	buildings
ajceb-7239	upgrading
ajceb-7239	office
ajceb-7239	office buildings
ajceb-7239	co2
ajceb-7239	energy consumption
ajceb-7239	energy efficiency
ajceb-7239	savings
ajceb-7239	emissions
ajceb-7239	cost
ajceb-7239	activities
ajceb-7239	potential
ajceb-7239	construction
ajceb-7239	study
ajceb-7239	table
ajceb-7239	case
ajceb-7239	environment