Resisting the North wind

The reporter Pere Renom travels to the Alt Empordà and lives the north wind. To directly experience both air friction and the force of gravity, he parachutes from 4000 meters, but can not fall above 200 km/h. The wind is the air in movement. How do resist the north wind the farmers and nature in the Empordà? Farmers have planted hedges of cypress to protect their crops from dehydration. At Cape Creus natural vegetation has adapted to the wind reducing leaf area and adopting streamlined shapes. And the Aiguamolls of Empordà become, windy day, a real service station for birds before rallying the Pyrenees. Renom also knows a wind tunnel being developed at the Politechnical University of Catalonia (UPC) to experience freefall without having to jump from an airplane. And Toni Mestres, the presenter of the program, explains some curious aspects of the physics of air. He also shows that the wind has a great ability to dry the lower the relative humidity, and that the shape and size of the wings of the birds is related to their body mass.