Seen from above, the Amazon resembles a huge billiard table, a field of intense green, pockmarked by brown stains. These stains are the sites of illegal mines, and they reveal the scope of a gold rush
Still used in Peru’s Coast and Andes to fertilize fields that are often far from the ocean or earth where it mounts, guano is a marvelous organic product that comprises excrement from three types of seabirds.