The Eden Project is one of the largest greenhouses the world. Millions of tourists walk through the artificial biomes each year. Some wonder how they maintain a garden on such a large scale. The answer? Balloons.
With trees such as the balsa and kapok nearly touching the 50m high ceiling, gardeners had to find some way to prune these beastly trees. That’s where tethered balloons came into play.
These giant air balloons allow scientists and garden up keepers access to the tops, studying and pruning.