andylim writes "UK wireless provider Orange and renewable energy experts GotWind, have come up come up with a prototype pair of power generating rubber boots. Inside the power generating soles of the boots there are thermoelectric modules constructed of pairs of p-type and n-type semiconductor materials forming a thermocouple. These thermocouples are connected electrically forming an array of multiple thermocouples (thermopile). They are then sandwiched between two thin ceramic wafers. When the heat from the foot is applied on the top side of the ceramic wafer and cold is applied on the opposite side, from the cold of the ground, electricity is generated."