I think Greta, along with David Attenborough (and the programmes he voices) and Extinction Rebellion have really put climate change back in the news in the UK.
Extinction Rebellion ran some of the most effective (or disruptive) protests seen in recent years, all without getting violent. Building a skatepark on a London bridge, dropping a yacht at a busy junction, gluing protesters to stuff. All new, all guaranteed to annoy the climate change denying right.
Greta's speech to the EU parliament really impressed me. Seeing the deniers personal attacks on her made me sure she is making a difference.