World leaders, scientists and activists are preparing for next month’s UN climate change summit in Scotland. These talks have been taking place for decades - but you sense the world is watching like never before, as awareness increases around how the planet is changing. In 1992, a 12-year-old called Severn Cullis-Suzuki from Canada gave a rousing speech and appeal for action at the Earth Summit in Rio. Severn and her father remain long-term environmental activists and host Nuala McGovern brings them together in conversation to hear their thoughts on whether Severn’s speech would be any different today.