User:The energy conversion system/sandbox

The human civilization is until now depending on fossil energy sources and not yet upon renewable energy sources, this is a very dangerous thing, because it could threaten the existence of human civilization in the future while the fossil energy is completely over, we still have time nearly 50 years for now to search renewable energy sources, otherwise after 50 years we may be not will have energy even to search for another energy sources. Therefore we must start rebuild in new bases of human civilizations which based on a renewable energy sources to give the human civilizations the same feature renewability.