Is co2 gas all the same weather it comes from a soft drink or the burning of fuels??

yes

so we should ban soft drinks. and stop global warming.

CO2 is CO2, not matter where it comes from.

The CO2 released from fossil fuel burning (natural gas, petroleum, coal) is essentially putting back in service carbon that had been segregated for million of year, while the CO2 used in carbonation of soft drinks is at least partially produced from processes that would have released the CO2 in the atmosphere already (fermentation).

There is also a huge difference in the quantity involved; a thirsty car spews a lot more CO2 than an army of thirsty soft drink drinkers.

Chemically, they're both CO2. If you check closely enough that you can notice atomic isotopes, the CO2 in soft drinks comes from the atmosphere, so it is about one part per trillion carbon-14. Carbon 14 has a half-life of around 6000 years, so fossil fuels, which are millions of years old, don't have any left. This fact helps us understand how much of the CO2 in the air has come from recent burning of fossil fuels, but doesn't affect chemical or greenhouse performance.

The gas is the same. Burning fossil fuels produces more than carbon dioxide, though, so don't worry about drinking soot in your soft drink.

If you're concerned about implications for global warming, consuming sodas won't increase your carbon footprint (except as they contribute to your own biological CO2-producing power plant). Existing CO2 is added to the water to make soda.

The CO2 in the soft drinks was extracted from the air very recently. Putting it back is no big deal.

The carbon in fossil fuels was buried over many thousands of years. We dig it up and burn it in a few tens of years. That's wrecking the climate, and going to cause a lot of hugely expensive damage if we don't do something about it:

http://www.globalwarmingart.com/wiki/Image:Climate...