Sun. Wind. Soil. The Valley region exhibits the ideal conditions required for growing green industries that leverage the natural environment to produce alternative energy. Some companies rooted in the Valley region have been helping people and businesses around the world to become more environmentally-friendly for decades. Others are just getting off the ground. Growth in solar, wind and biofuel industries is a gradual process, and despite the challenges, local leaders have seen progress and are optimistic about the future. — Special Report by Mary Catherine Holcomb