寒带 (hán dài): ภูมิอากาศขั้วโลก

Polar bears live in the cold polar regions, where the land is covered in ice and snow all year round.

This botanist specializes in polar plants, because they can survive even under extremely cold conditions.

Compared with the tropics, temperatures in the polar regions are very low; at their coldest in winter they can reach minus fifty degrees.

Because of global warming, polar glaciers are melting rapidly, which has caused many animals to lose their homes.

The expedition spent three months crossing the polar region, recording local climate changes and the activity patterns of wild animals.