The sea300字
Vast ocean covers 71% of the earth, it is the main source of fresh water runoff from the mainland. Vast waters, large water and the incessant flow of the current regulation of the global temperature and precipitation. So it can be said that the Marine conservation for the survival of all living things upon earth, including human reproduction.
Sea open big heart, also let people to explore its rich treasure.
The sea is the human future food base. Algae products alone 20 times more than the world wheat production present. Ocean for humans to provide 3 billion tons of fish each year. According to the calculation of ocean's ability to provide food is land 1000 times.
Ocean is a huge tank farm. Offshore oil recoverable reserves of about 300 billion tons, is the world's 40% of the total reserves of oil. The seabed manganese nodules is available for human use of tens of thousands of years. Also contain uranium and hydrogen isotopes in sea water and so on many kinds of nuclear materials, there are a large number of inorganic salts and other resources.
The sea is very important for us human beings, it provides us with a lot of resources.
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The sea300字
