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Gravity affects diving by pulling the diver towards the earth, increasing the pressure on the body the deeper they go. This pressure affects the compression of gases in the body, potentially causing issues such as nitrogen narcosis or decompression sickness. Additionally, gravity affects buoyancy, making it harder for divers to stay afloat and control their position underwater.
Divers breathing compressed gases at depth are themselves under pressure. For each 33 feet/10 meters that a diver descends, they add approximately 1 atmosphere of pressure to their body. When they breathe gases whilst their bodies are under this pressure, the gases dissolve into their bodies tissues. When they ascend, the pressure is relieved, and gases are released. Provided that diver ascends sufficiently slowly, the gases are released slowly and no problems result. But if the diver ascends too slowly without allowing the gases to expire at a slow enough rate, then the diver will suffer decompression sickness when gas bubbles form in the diver's tissues and blood.
Increased pressure causes gas to dissolve into the diver's body fluids, such as blood and tissues, at a higher rate. As the diver descends deeper underwater, the pressure increases, leading to more gas being absorbed into the body. This can result in decompression sickness if the diver ascends too quickly without allowing the excess gas to slowly off-gas from their system.
A gill is a filamentous organ specialized for the exchange of gases underwater. Some aquatic animals have gills that are adapted in such a way so as to allow them to breathe out of the water.
gases
it depends
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Nitrogen itself is not harmful to people when breathed in, as it makes up about 78% of the air we breathe. However, nitrogen poses a risk if present in excessive amounts in closed spaces, as it can displace oxygen and cause suffocation. Additionally, nitrogen can react with other substances to form harmful compounds.
there are many pollutants. These are greenhouse gases.
Some greanhouse gases and Carbon Dioxide, CO2
This depends on the nature of substances: organic or inorganic.