Urgency and vision are the twin pillars on which humanity's hope now hangs.

The sunlight ... that strikes Earth’s land surface in two hours is equivalent to total human energy use in a year. While much of that sunlight becomes heat, solar energy is also responsible for the energy embodied in wind, hydro, wave, and biomass, each with the potential to be harnessed for human use. Only a small portion of that enormous daily, renewable flux of energy will ever be needed by humanity.

The challenge now is to renovate the baroque structure that the Kyoto Plan has become—or else scrap it and get ready to start all over.

Urgency and vision are the twin pillars on which humanity's hope now hangs.

Sometimes electricity provides unexpected benefits. In a remote village in China's Fujian province in which young men have traditionally had a hard time finding wives, the arrival of electricity has attracted more brides

Building a world where we meet our own needs without denying future generations a healthy society is not impossible, as some would assert. The question is where societies choose to put their creative efforts

The 1,230 gigawatts (GW) of renewable power generating capacity in place at the end of 2009 now constitutes just over 25 percent of total generating capacity worldwide. This is over three times nuclear generating capacity and roughly 38 percent of the capacity of fossil fuel-burning power plants worldwide.