Ever since modern society began to form, we've treated Earth ... not well. And in recent years, we've started to realize — and in even more recent years, started to accept — that things are going to get pretty bad for us in the next several decades. Here Neil deGrasse Tyson explains the good news (Earth will survive!) and the bad news (sorry, humans!) and lays out the facts that should guide us toward fixing things before it's too late. Because there's still time. So let's make things better, OK?