2. Read the text. Decide if the sentences are T (true), F (false) or NS (not stated). Correct the false statements.

1) F - Lake Baikal contains freshwater, not salty water.
2) T - A great variety of species live there.
3) T - It is expensive to ice dive in Lake Baikal.
4) T - Diving under the ice should be planned very carefully.
5) T - Lake Baikal attracts a lot of divers all year round.
6) T - Lines on the ice help divers see while they are under the ice.