Ejemplo de regeneración con draga y arena de mar

[youtube http://www.youtube.com/watch?v=IcgNpg-ri9A&w=560&h=315]
[youtube http://www.youtube.com/watch?v=GFGihbHwE0M&w=560&h=315]

[youtube http://www.youtube.com/watch?v=VTKJy5wRdz0&w=560&h=315]

[youtube http://www.youtube.com/watch?v=MnY-6ZtrsvA&w=560&h=315]
[youtube http://www.youtube.com/watch?v=HbNwh7KfT2A&w=4560&h=315]

[youtube http://www.youtube.com/watch?v=qd2Cxhakv9o&w=560&h=315]