1 Navy pilots move a lot, both during and after training. During your 2 to 2.5 years of flight school, you can expect to move 3 or 4 times. While you will be home during school, you will work odd and often inconsistent hours.  Your work obligations are dependent on your country's needs.
], respiration [respiration: Chemical change that takes place inside living cells, which uses glucose and oxygen to produce the energy organisms need to live. Carbon dioxide is a by-product of respiration ] and combustioncombustion: Combustion is the process of burning by fire.. Green plants remove carbon dioxide from the atmosphere by photosynthesis. Living organisms - including all plants and animals - release energy from their food using respiration. Respiration and combustion - burning - both release carbon dioxide into the atmosphere.
A carbon sink is a natural or artificial reservoir that accumulates and stores some carbon-containing chemical compound for an indefinite period. The process by which carbon sinks remove carbon dioxide (CO2) from the atmosphere is known as carbon sequestration.