Repowering London plans to create 40 energy gardens on the Overground network by October this year. The gardens will grow food and flowers, host bees and birds and clean the air on the platforms, where particulate matter from breaking trains is hazardous for humans to breathe. The next step is to raise money to instal solar panels on the roof of an overpass at Highbury & Islington station. The panels will generate money from the feed-in tariff that energy suppliers pay to those putting energy into the system. The plan is to distribute the tariff revenue across the Energy Garden group to fund a volunteer coordinator at each station. TfL did not respond to requests for comment.