Secrets of Seas
The ocean has always been a source of food for man. But until now only about 1% of mankind's food comes from the sea and much of it is fish. Besides fish there are prawns, shrimps, lobsters and whales are commonly called fish although they are scientifically classified differently. There are over twenty thousand kinds of fishes living in the sea. We eat only a few kinds. We should try to eat some other kinds, too. To increase the sea's yield of fish, we will have to start fish farming in the sea. In China, sea weed is now harvested for use both as a food and as a fertilizer. Today the world is faced with a growing energy shortage. We need to explore new sources of energy. The ocean's energy locked up in the constantly changing temperatures of the ocean currents, is boundless. In France, the energy of the ocean's tides is being harnessed to produce electricity.
The ocean has always been a source of food for man. But until now only about 1% of mankind's food comes from the sea and much of it is fish. Besides fish there are prawns, shrimps, lobsters and whales are commonly called fish although they are scientifically classified differently. There are over twenty thousand kinds of fishes living in the sea. We eat only a few kinds. We should try to eat some other kinds, too. To increase the sea's yield of fish, we will have to start fish farming in the sea. In China, sea weed is now harvested for use both as a food and as a fertilizer. Today the world is faced with a growing energy shortage. We need to explore new sources of energy. The ocean's energy locked up in the constantly changing temperatures of the ocean currents, is boundless. In France, the energy of the ocean's tides is being harnessed to produce electricity.