Individual action will not in and of itself solve the climate crisis, but I believe it could be a powerful lever to build the critical mass needed to put global warming at the top of our politicians' agendas. We need to convince our families, friends and neighbors that the climate crisis is a big deal. Words are cheap. But if people see us actully making substantive personal sacrifices in our own lives, sacrifices that cannot be merely written off as performative signaling, but that can only be explained by a strongly held belief that climate change is a BIG DEAL, our exhortations will be far more persuasive.