HORIZON: The GREEN MACHINE
Examines recent research into the physical, chemical and electrical activity of plants. Filmed in botanical centres in Britain, France and the United States. Studies featured include research into extrasensory perception by Cleve Backster in San Diego, photosynthesis, the subtle use of hormones by plants to regulate growth and evidence uncovered by scientists in America and Britain of nerve-like impulses in plants.
Leaves are the planet's finest solar panels. This programme looks at the process of photosynthesis.