The statement is true. Dead zones are the zones of oxygen depletion, which is caused by excessive running off of the fertilizers into the water body. These chemicals, particularly the nitrates, which are used by algae etc. which bloom by using the nitrates and use the oxygen present in the water. When they die, oxygen levels become critically low till then, for other aquatic animals like fishes etc., to survive.
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A sexual norm can refer to a personal or a social norm. Most cultures have social norms regarding sexuality, and define normal .
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Klay does not have to worry about anything blowing up or inhailing harmful gases.
Phytoplankton are tiny microscopic plants algae<span> that form the base of the marine food chain. The most </span>important<span> living things on our green planet are single cell</span>algae<span>. And they are the most </span>important<span> because they produce oxygen, more oxygen than anything else does</span>
