Are there any? If you look at the newspaper most days you will see nothing but bad news stories on climate change, from record high temperatures in the Arctic to cancelled funding for US climate monitoring projects (no thanks to President Donald Trump). So when I was asked to do a short ‘Optimistic Show and Tell’ at the Science Festival, my first thought was ‘you must be joking’. But then I had some second thoughts. There is actually quite a lot of good news too, only the media tends to bury it. Plus there is a lot happening under the radar right here in Cambridge. This is what I intend to talk about on Saturday.