As humans continue to destroy the planet, we should be coming up with new ways and inventions to live a greener existence. One of those inventions is by Gotwind in partnership with Orange and their called the Power Wellies.
The way that these boots work is that they convert the heat energy that your body generates from the sole of your foot, and converts that heat energy into electricity.  You can then plug your phone into the boots and charge it using the electricity that was collected.
The process involved in collecting the heat energy and converting it is known as the “Seebeck effect”. Essentially, there are a number of thermocouples, made of p-type and n-type semiconductors. The thermocouples are electrically connected to each other, and they are all placed between two ceramic wafers. The heat from your foot, coupled with the cold from the ground, produces electricity.
If science isn’t your thing, all you really need to know is that 12 hours of using the boots will generate one hour of phone use. This definitely doesn’t seem like much, but it is a step in the right direction for green energy.