All Human-Made Objects on Earth Amount to 30 Trillion Tons

Scientists recently discovered that all objects on Earth created by people adds up to an astoundingly large figure. All of these objects are collectively known as Earth's "technosphere." Distributed evenly over the planet's surface, the technosphere would translate into about 110 pounds (50 kilograms) for every 11 square feet (1 square meter), the researchers said. "The technosphere is a system, with its own dynamics and energy flows – and humans have to help keep it going to survive," Zal