<span>Geographic information system is used to capture, manage and presenet spatial or geographic data. Mapping is the central function of GIS. It was widely used in mapping the rainforest in Borneo, third largest island, and arrived more alarming conclusions like loss of diversity, species becoming endangered etc.</span>
When a person or group works freely it is called 'community service'.
I believe <span>A country with a large amount of oil and petroleum resources is the answer.</span>
The answer would be: Intake, Compression, Power, and Exhaust.
<span>Intake: also known as induction or suction.
Compression: starts at the end of the suction stroke, and ends at T.D.C.
<span>Power: also known as combustion. This is the start of the second revolution of the four stroke cycle.
</span><span>Exhaust: also known as outlet. In here, the piston once again returns from B.D.C. to T.D.C. while the exhaust valve is open. This action eliminates the spent air-fuel mixture through the exhaust valve.</span></span>
