energy-conversion efficiency
energy-dependent process
energy-dispersive spectroscopy
energy-dispersive X-ray analysis
energy-dispersive X-ray diffraction
energy-dispersive X-ray spectroscopy
energy-loss spectroscopy
energy-momentum tensor
energy-saving technologies
energy-transfer process
energy relaxation
energy release
energy release rate
energy requirements
energy reserves

energy resolution
energy resources
energy restriction
energy retention
energy retention efficiency
energy saving
energy savings
energy scale
energy sector
energy security
energy sensor
energy separation
energy shift
energy shortages
energy side
energy sites

energy source
energy source used
energy spectrum
energy splitting
energy state
energy states
energy status
energy storage
energy storage material
energy storage systems
energy stores
energy strategies
energy stress
energy structure
energy substrates
energy supply

energy surface
energy systems
energy technologies
energy terms
energy transduction
energy transfer
energy transfer efficiency
energy transfer mechanisms
energy transfer processes
energy transfer rates
energy transformation
energy turnover
energy usage
energy use
energy used
energy utilization

energy utilization efficiency
energy values
energy yield
enforcement
enforcement actions
enforcement agencies
enforcement authorities
enforcement costs
enforcement efforts
enforcement mechanisms