We should have been listening to the scientists in 1950, when the link was first found. What has been important about Ms Thunberg’s visit today—it is amazing to see the work—is that the conversation has gone from being niche, held between people who, like me, have long-standing interests in this area, to a mainstream conversation where everybody is talking about what it is that we need to do. That is why this is such a challenge but is so important. For the first time, the whole country is talking about climate change. I believe the whole world is talking about climate change and how we stop it. There are no deniers on the Conservative Benches.