How does carbon dioxide enter the atmosphere?

Answer:

Carbon dioxide (CO2) is released from various sources such as living beings, industries, automobiles, burning of fossil fuels, etc.

• Respiration from plants and animals.
• Decay of plant and animal matter. This converts to carbon dioxide in the presence of oxygen, or into methane if there is no oxygen.
• Burning of any organic material oxidizes the carbon to produce carbon dioxide.
  
  • Burning fossil fuels releases CO2 that has been stored for millions of years.
    
  • Burning biofuels releases CO2 that has been stored for only a few years, or less.
• Production of cement. When limestone is heated to produce lime, CO2 is released.
• As the oceans become warmer, CO2 is released from the surface.
• Volcanoes emit water vapor, CO2 and sulfur dioxide. Silicate weathering is a process that removes CO2 and the two processes, the chemical reverse of each other, cancel each other out.

Carbon dioxide is manufactured mainly from seven processes:

1. As a by-product in ammonia and hydrogen plants, where methane is converted to CO2;
   
2. from combustion of wood and fossil fuels;
   
3. as a by-product of fermentation of sugar in the brewing of beer, whiskey and other alcoholic beverages;
   
4. from thermal decomposition of limestone, CaCO3,
   
5. in the manufacture of lime, CaO,
   
6. as a by-product of sodium phosphate manufacture,
   
7. directly from natural carbon dioxide springs, where it is produced by the action of acidified water on limestone or dolomite.

See the links below.

• The two main ways that carbon enters the atmosphere is by combustion and bio process. CO2 or CO are the main two atmospheric carbon gases. Carbon monoxide is formed when a hydro-carbon fuel is burned without sufficient oxygen. This gas is still combustible this is what a catalytic converter does, it burns the unburned fuel and carbon monoxide into CO2. The modern gas engine does a poor job of efficiently burning fuel, mainly because the piston dynamics is so poor in a crank driven piston. Carbon is also part of many volatile chemicals which can evaporate into the air.
• combustion
• death & respiration
• when people breathe, we release carbon dioxide, the gas for of carbon, into the atmosphere. with too few trees to use it to make oxygen, we have global warming.
• When animals and plants respire, we release carbon dioxide into the atmosphere. In addition, some cars release fuels such as carbon dioxide.
• by circulation