The digital age has lead to a succession of smaller, cleaner and less power-hungry technologies, but we are approaching the fundamental limits of technology as we know it. To handle the Internet of Things, big data and AI we need more computing power, better connectivity and better security. An entirely new method of computing will be necessary: quantum computing. But whilst we look to the future, we need to come to terms with the consequences of another age in our past: the nuclear age. How can the technology of today help clean up the technology of the past, the present and the future?