Hack4Climate, the world’s first blockchain hackathon to fight climate change, opens its one month application period. Interested participants from across the world can apply. 100 will be invited to attend the 4-day hack held in parallel to COP23, the UN Climate Change Conference, this November in Bonn, Germany. Starting with Boston (at MIT’s Media Lab) on 11. September, 15 pre-workshops are held in global centres.