The Edge in the Netherlands in the most 1) eco-friendly building in the world. It has got 2) solar panels that produce more electricity than the building uses. It has a natural ventilation 3) system that uses mesh panels ald lots of 4) windows to allow natural light in. It has a water 5) collection system that uses rainwater to flush the toilets and water the gardens. It also has birdhouses and bat boxes in the gardens for the local 6) wildlife.