Oregonian: There's a big reason climate change differs from so many public policy challenges: Unlike other crises, addressing the planet's major environmental crisis truly requires mass consensus. Indeed, because fixing the problem involves so many different societal changes -- reducing carbon emissions, conserving energy, retrofitting infrastructure, altering a meat-centric diet, to name a few -- we all need to at least agree on the basic fact that we are facing an emergency. This is especially the case in...