According
to Wikipedia, oxygen is a member of the Chalcogen group on the periodic table
and is a highly reactive nonmetallic element that readily forms compounds with
almost all other elements. The Chalcogen group is also known as the oxygen
family. Oxygen is also a strong oxidizing agent and has the second-highest
electro negativity of all the elements. It is also the third-most abundant
element in the universe, after hydrogen and helium and the most abundant
element by mass in the Earth’s crust.
The
most important use of oxygen is for breathing. Animals require oxygen in the
air or water to live. Therefore, oxygen therapy is used for people who have
trouble breathing due to some medical condition. Oxygen is poisonous to bacteria
that cause gangrene; it is used to kill them.
Oxygen is
sustainable development because it will never finish, not like petrol, they
will finish in the future if we use it a lot. Plants can provide oxygen to
nature, to animals, to human, that is one of the reasons why oxygen would not
finish. Although the nature provides petrol now, but does not mean we can have
petrol in anytime we need. The nature does not provide petrol all the time, but
it takes a long time to decomposed fossils deep within the Earth. Human needs
oxygen to survive, that is why the nature provides us, is natures circulate. But
human do not need petrol to survive. Without them, we still can live long. Therefore,
nature provides lesser petrol, and human needs to learn how to spend less on
unsustainable things to maintain and protect the Earth.
Lastly, we
know that oxygen is sustainable development but once we make the Earth get
sick, we might not have any oxygen which provided by the nature anymore. Humans
should learn how to appreciate what they having now, and recycle it.
