Grist: How should governments treat people who are forced to migrate due to climate change? That question is on the working agenda for the upcoming Paris climate talks, at least sort of - and thats a good thing. As it stands, theres no clear definition of what, exactly, a forced climate migrant is; nor is there an international legal framework to deal with the mass movement of people (and, sooner than you might think, entire nations) displaced because of global warming. Paris could go a long way toward...