Are you referring to the prediction that based on data, it is possible that the polar ice caps could see ice less summers as soon as 2013? That doesn't make it extremist to acknowledge that based on the data, it is a possibility. Without knowing for sure what the future will bring, predictions are made. Those predictions have ranges, because it would be silly to say "the earth will warm by exactly this much by 2013". What is extremist is to take the extreme end of those predictions and pretend that was the prediction. Do you see?