efficient space efficient staff efficient stirring efficient storage efficient strategy efficient structure efficient supply efficient support efficient synthesis efficient system efficient systems efficient tax efficient team efficient teamwork efficient technical efficient technique efficient techniques efficient technologies efficient technology efficient than ever efficient thermal efficient to use efficient tool efficient tools efficient trade efficient trading efficient training efficient transfer efficient translation efficient transmission efficient transport efficient transport system efficient transportation efficient treatment efficient type efficient usage efficient use efficient use of available efficient use of energy efficient use of natural resources efficient use of public efficient use of resources efficient use of space efficient use of time efficient use of water efficient utilization efficient vehicle efficient vehicles efficient waste efficient water efficient way efficient ways efficient web efficient windows efficient work efficient workflow efficient workflows efficient working efficiently efficiently and effectively efficiently and quickly efficiently and safely efficiently as possible efficiently handle efficiently manage efficiently managed efficiently managing efficiently performed efficiently produced efficiently run efficiently use efficiently used efficiently when efficy effie effigies effigy effin effing effingham efflorescence effluent effluent can effluent discharge effluent gas effluent monitoring effluent obtained effluent quality effluent stream effluent treatment effluent treatment plant effluent water effluents effluvium efflux efflux transporter effort effort aimed effort and attention