At White Sands National Park, history unfolds one 10,000-year-old footprint at a time. Two sets of footprints chart a fragile path across the bleached playa of White Sands National Park and into ...

The Ecological Footprint adds up all the ecological services people demand that compete for space. It includes the biologically productive area (or biocapacity) needed for crops, grazing land, ...

In fact, his water footprint concept created a whole new scientific discipline—one that promises to shape solutions for the challenges we face. Direct water use is what you can see being used ...