How Is Carbon Dioxide Formed?

One source of CO₂ is by and large exhaust from vehicles and other machines that use fossil fuels for an energy source.

Gasoline is produced by factory's and cars this then combines with the oxygen and this is then Co2. It and many other gases form the ozone layer (I think) and this then traps heat so our world heats up :)

I think a more appropriate answer would be anything that is organic [i.e. Already has carbon in it] is heated to its flash point, or its thermal breakdown limit, that a carbon molecule is released from it. Burning paper, burning grass, burning kerosene. Anything organic releases, or better to say "liberates", a carbon molecule from its surrounding molecular bond with the existing substance in question once its reaches a point of molecular bond instability. Does that mean the carbon molecule changes? No. Just the bonds are broken. The carbon molecule is liberated and free to bond with other molecules that are accepting to its electrons within its shell (in order to fill its electron shell). Which is the reason why there are 2 oxygen molecules for every one carbon molecule. The outer most electrons in the oxygen molecule [oxygen has 8], shares a bond with 1 single electron and places it [the oxygen electron] in carbons electron shell in an attempt to fill it. Since its lacking a mate, it [the carbon molecule] accepts another electron from another oxygen molecule which in turn gives you C + O2 --> CO2. We ourselves expel CO2 in breathing since we too expend energy. But the C is liberated in a different manner by means of a biochemical process via the avioli in our lungs. The carbon that circulates in our bloodstreams introduced into us via the foods we had taken in, or breathed in. Since there are trace mounts of CO2 in the air already.

You guys are idiots. Electricity does not form carbon dioxide...

When gasoline is burned, the carbon in it combines with oxygen in the air to form carbon dioxide. Because the oxygen adds weight, the newly formed carbon dioxide weighs more than the original unburned fuel.

I have heard commercials recently asserting that computer equipment produces carbon dioxide. My question is does electricity running over wires produce carbon dioxide?

It can be formed by smokers, aerosols and others!! Hi friends(L)