The fall and the light

Light therapy, is a treatment that helps to overcome the seasonal gloom caused by the reduction of hours of light during autumn and winter. The reporter Pere Renom interviews specialists in psychiatry and sleep, and a lighting technician. He also visits one of the most beautiful autumn landscapes of Catalonia, in the Pyrenees, to explain why the the leaves change in color. Looks closely a few wild mammals and witness how they prepare for the winter. And dives off the coast of Mataró to see the submarine autumn.