energy-efficient

the data transmission comes for free --highly energy efficient.I don't mention the high energy efficiency

And in order to do that for cars, you have to come up witha really energy efficient car,so that means making it incredibly light,

A liquid fluoride thorium reactor would be a compact facility,very energy-efficient and safe,that would produce the energy we need day and night,

flipping their fleets to electric vehicles,making their buildings more energy efficientand working with their suppliers to drive down their emissions.

industrialized countries must cut their emissions,must become much more energy-efficient,and must move as quickly as possible to renewable energy.