In Important Innovations: Collection, Volume 4, we showcase innovation in green, sustainable, zero-emissions energy innovation. The examples are fascinating and include outer space orbiting "magic carpets" of solar panels that soak up the sun and transmit electricity back to earth. Also, innovation in fusion technology, which is the same process that keeps the sun and stars burning for billions of years. Nuclear fusion converts a small amount of hydrogen into electricity and promises to make other forms of generating electricity obsolete. We showcase small nuclear reactors travelling by truck to deliver power where it's needed. Commercial-scale energy kites generating electricity from the wind. Rooftop devices that draw sun power to generate electricity and cold energy from outer space to heat and air condition homes. We detail the first trains and electric planes operating on hydrogen fuel cells. Also, we focus on huge solar farms floating on bodies of water for greater efficiencies. Highly efficient batteries developed from living organisms and powered by light or water are also detailed. The world is demanding cheap, efficient and readily available sources of green, sustainable energy. As a journalist, I'm finding the global scientific community is consistently delivering exciting breakthrough innovations across the energy field. Important Innovations: Collection - Energy chronicles the latest and greatest energy and power generation innovations in fun, brief, news story listens.