The forest canopy remains one of the world's most inaccessible places.
Besides being the main interface between the atmosphere and life on Earth in the control of our climate, it's thought that 40% of all species live there.
The forest canopies are considered to be the great lungs of the earth, where the atmosphere meets the biosphere.
But what effect will any predicted climate change have on the inter-relationships that exist between the atmosphere and life 50 metres above the forest floor?
Andrew Luck-Baker meets climatologists to assess how trees will contribute to global climate change.