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My name is methane and this is my friend named water.
Nice to meet you my name is ammonia.
Hello new students please take a seat so we can get to know everybody before our field trip.
Come on class lets take this secret path way to take us to the blue- green algae on earth.
There is also photo-decomposition which is also important source of oxygen. The amount of free oxygen icreased, an ozone layer began to form filtering out ultraviolet radiation and allowing for the development of more complex species.
This algae converted the existing carbon dixodie and water to free oxygen gas and glucose. This is known as photosynthesis.
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