The Arctic Ocean (Figure 1), the smallest of the world's five major oceans, is about 4000km (2500 miles) long and 2400km (1500 miles) wide, about the size of the continental USA. It lies entirely ...

The closing has nothing to do with the reduction in pollution caused by having much of the world on COVID-19 lockdown. The largest hole ever observed in the ozone layer over the Arctic has closed ...