A company called Pavegen has developed a technology to turn footsteps into electricity . Walking and other human activities can generate power via piezoelectric cells . Pavegen 's energy harvesting technology can produce up to 100 watts of electricity with each step . Analysts estimate the energy harvesting industry could be worth as much $ 30 billion by 2018 .
A company called Pavegen has developed a technology to turn footsteps into electricity . Walking and other human activities can generate power via piezoelectric cells . Pavegen 's energy harvesting technology can produce up to 7 watts of electricity with each footstep . Analysts estimate the energy harvesting industry could be worth as much $ 30 billion by 2018 .