Rapid melting of sea ice in the Arctic is the largest and most clear sign of human-made climate change. Deposit Photos The decades-old international treaty that banned ozone-depleting substances has successfully averted huge amounts of sea ice loss—delaying the first ice-free Arctic summer by as much as 15... read full story
"The first ice-free Arctic summer–with the Arctic Ocean practically free of sea ice–will be a major milestone in the process of climate change, and our findings were a surprise to us,"