The “smart bins” are equipped with solar panels and batteries which can operate for up to five days once fully charged. Waste is compressed to a fifth of its original size which allows the bin to hold a lot more than its usual capacity. As it utilises space more efficiently, a smart bin need to be emptied less often which reduces the pollution created by garbage trucks that come to collect it. Each bin is equipped with a 3G transmitter which provides sanitation workers with a real time alert when it is full through a smartphone application that also displays its location. (via Korean Startup Aims to Solve Trash Issues)