Mankind can product the energy not only from oil. There are wind energy, sun energy. Soon people will switch to this types of energy product.
Yes mankind produces energy any materials around us and not only from oil. But it doesn't mean destroying the world. In my own understanding,people working on these job are knowledgeable enough for this kind of job. so why worry, they are not destroying the world instead they're building economy of the world to a prosperous one.