Actually many studies proved that there is a natural long cycle in which artic slowly melt and then refroze. It happend that we'r in this period. So it's harde

Actually many studies proved that there is a natural long cycle in which artic slowly melt and then refroze. It happend that we'r in this period. So it's harder to determine how much the global warming impact the melting of the pole, but we all know the answer.