What is bad about road building in the amazon?

Answer 1

In order to build roads, you have to cut down trees -- in the Amazon, this destroys large tracts of land because the soil is so poor that when you tear up any small part, the whole area starts eroding during the rainy season because the tree roots holding down the soil are gone. Also, the Amazon produces the most oxygen on the planet, so tearing down trees is reducing the amount of oxygen we can breathe.