Photo by lucalocatelliphoto / Clouds rising from one of the world's largest geothermal power plants in Iceland are formed by steam emanating from the heart of a volcano. Intense volcanic activity allowed Iceland to expand its reliance on geothermal power for heating and energy production, and today almost all of Iceland's electricity is produced from renewable sources. Iceland's approach is a subject in my latest story for National Geographic magazine called "The End of Trash." It's about the circular economy surfacing as a promising solution to waste, pollution, and emissions. By designing waste out of the production system, circularity aims to keep resources and materials in use while regenerating natural systems. While a circular economy is promising, it is only one of the tools that may help turn our collective situation around. The truth is there isn't one single solution, yet each one of us can make a difference through more purposeful living and staying informed. Please foll...