Vienna, Austria ‘There wasn’t a big turnout but the atmosphere was great and included songs and speeches by young students. One of the signs says: “2080: Grandma, what is a polar bear?” In terms of what can be done, I think it is important to create the right structural framework; invest in the development of new technologies and invest in the public transport system so there are real alternatives. The good news is the Austrian parliament declared a climate emergency and decided on a new law which will not allow oil heaters to be installed in new buildings from 2020.’

Photograph: Tobias Weber