Jason Briner, associate professor of geology and global climate researcher
We should be fairly worried. Obviously, the threat differs from that of an all-out nuclear war, but the ramification of our climate system maintaining its current trajectory will be the end of the world as we know it. The question among 97 percent of climate scientists is not whether the planet is warming, or whether humans play a major role, or even what we can do to stop it. Rather, we are now wondering how fast climate will change, how much sea levels will rise and whether world leaders can implement the necessary changes to soften the blow. It will require a world of effort, including from you and me.