My work looks at how politicians respond to climate change, and speaking to them it’s clear that there’s a crucial role for individuals to set an example and show that climate policies have support. That’s why I do all I can to avoid flying, for work or at home. I haven’t said I’ll never fly again, but aim for less than once every three years. I pick conferences and holidays that are reachable by train, and have transferred a lot of work to video link.