Mobile Suit Gundam 00 is a Japanese anime series set in a future where fossil fuels have depleted, leading to a reliance on solar power. The story follows a group called Celestial Being, which uses advanced mobile suits called Gundams to end war and unify humanity. The series explores themes of war, peace, and the evolution of human society. It originally aired in 2007 and is part of the larger Gundam franchise.