The term for blue skin caused by lack of oxygen is cyanosis. One is said to be cyanotic when presenting with this discoloration.
Sink<span> is a </span>carbon<span> reservoir that is increasing in size, and is the opposite of a </span>carbon<span> "source". The main natural </span>sinks<span> are the oceans and plants and other organisms that use photosynthesis to remove </span>carbon<span> from the atmosphere by incorporating it into biomass.</span>
Gives plants nutritions and help them to grow<span />
