Science and technology № 15 (1969)

1. The Volga-Caspian Sea should be clean.

Sturgeon fish.

Fishermen take sturgeon out of the nets.

Drains drained into rivers.

Ships on the Rhine.

The Statue of Liberty.

View of New York from the bay.

Fishermen pull out a net with fish.

A fisherman with a huge sturgeon.

Oil rigs in the Caspian Sea.

Oil pipeline.

Settling tanks for dewatering oil.

Cartoon scheme of oil sludge.

Oil film on the water.

A tug at sea.

Stages of further water purification.

Toxic

Sewage treatment plants in Sumgait.

The first stage of treatment facilities.

Settling tanks for mechanical cleaning .

Biological treatment pools.

Bacteria under the microscope.

Toxic water discharged by an artificial rubber plant.

Fish in the coastal thickets.

Juvenile sturgeon.

Fish hatchery.

Release of fry in the Caspian Sea.

Belorybitsa.

Artificial insemination of white fish eggs.

Apparatus for incubating eggs.

Fishermen dump fish from the trawl on the deck.

Beluga.

Packaging of black caviar.

Cans of black caviar.

Juvenile sturgeon.

Fishermen take sturgeon out of the net.