A chainsaw buzzes, branches snap, and an Amazon tree crashes to the ground. It could be just another of the thousands of trees felled each year in Brazil

A chainsaw buzzes, branches snap, and an Amazon tree crashes to the ground.

It could be just another of the thousands of trees felled each year in Brazil's portion of the world's largest forest except for one detail: a microchip attached to its base holding data about its location, size and who cut it down.

With a hand-held device, forestry engineer Paulo Borges pulls up the tree's vital sta