Where does CO2 come from??

Question

Where does CO2 come from??

Answer 1

Lots of places.  But here's what you really need to know.

There are a great many natural sources and sinks for carbon dioxide.  But the present global warming is (mostly) the result of man made CO2 from burning fossil fuels.

There is a natural "carbon cycle" that recycles CO2.  But it's a delicate balance and we're messing it up.

Look at this graph.

http://scrippsco2.ucsd.edu/graphics_gall...

The little squiggles are nature doing its' thing. CO2 falls a bit during summer when plants are active, and rises during the winter. The huge increase is us, burning fossil fuels. The scientists can actually show that the increased CO2 in the air comes from burning fossil fuels by using "isotopic ratios" to identify that CO2.  The natural carbon cycle buried carbon in fossil fuels over a very long time, little bit by little bit. We dig them up and burn them, real fast.  That's a problem.

Man is upsetting the balance of nature.  We need to fix that.

Answer 2

Your mouth.

Answer 3

From  the combustion and processes of organic substance rotting

Answer 4

CO2 Comes from plant and animal respiration, burning of hyro carbon and fire wood.It equally comes from the cars and engines we use to power our industries.Your breathing in takes o2 while the breathing out contributes to the co2.

Answer 5

it comes from plants through a process called photosynthesis.

~environgrl

Answer 6

Volcanoes, exhale, decaying plants, internal combustion engines, etc.  Basically you need to quit breathing, driving your car, barbecuing your burgers, mowing your lawn, etc.  It's all really really bad for the environment.  Bummer!  Basically everything that's fun is bad and produces CO2.  Except s*x.  That would be the only thing that doesn't produce CO2.

Answer 7

We exhale it. Combustion of any kind.