An anonymous reader writes: Apple is making a huge investment in solar energy, sending $848 million to First Solar's California Flats Solar Project. The deal will supply Apple with energy for 25 years. Construction of the new 2,900-acre solar farm will start this summer and finish by the end of 2016. Apple's share of the energy produced will be about 130 megawatts, while another 150 MW will be sold to Pacific Gas & Electric. "The iPhone maker already powers all of its data centers with renewable energy. Tim Cook, Apple's chief executive officer, has advocated taking more steps to combat climate change."