Battery-powered sensors are placed in select places and connected to the city's network to provide timely information
It directly rewards users with money or coupons when they recycle everyday waste items.
During its first year on the road, the Psychiatric Emergency Response Team (PAM) ambulance in Stockholm responded to over 1,000 individuals in need of help.
The Battery Refund machine is a reverse vending machine for waste consumer batteries that can automate the collection of old batteries and reward people for their effort.
Most homeless people in the city know where there are shelters, but during emergencies - they may don't know where the new ones will be.
A power station northwest of the Swedish capital is to become fossil fuel-free by 2020 with a little help from moldy H&M clothes.