In this second episode, the documentary examines their ecological advances. In this field, the properties that are expressed on the scale of a millionth of a meter never cease to amaze scientists. Initiated about thirty years ago, research has been the subject of huge investments in industrialized countries. Today, the first applications are coming out of laboratories: nanometric crystals allowing solar collectors to occupy a central place in our energy production, reduction of polluting emissions that poison the air of our cities by adding molecules to our fuels… But do these particles, whose "behaviour" is still poorly understood, present any danger? How to ensure that they will not be added to the heavy ecological heritage left to future generations? Never has the development of a technology been accompanied by so many questions and concerns...

The Serie : It’s a universe where scientists explore matter on a scale 80,000 times smaller than a human hair. It’s a gigantic global laboratory where scientists converge from all disciplines, and dedicate themselves to observing and manipulating the smallest particles in the natural world.

Thirty years ago, new microscopes first opened the doors to this new dimension and allowed scientists to begin moving individual atoms and molecules .This science of the miniscule is already opening up a new world of possibilities. Nanotechnology has been called “the next technological revolution”. It is said to provide groundbreaking solutions to the most serious problems that threaten our future –it promises faster computers, improved security, longer healthier lives and a cleaner earth.