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The main concern is CO (carbon monoxide) and less on CO2 (carbon dioxide). Older car (or trunk) engines have lower efficiency to clean up CO, so there is a greater danger of CO poisoning if one was to be trapped in an enclosed area with the engine running. However, modern car engines today are much more effective in cleaning up CO by as much as 95%, so the risk is much smaller now. That said, CO concentration can still build up rapidly in an enclosed area. In such an enclosed area, it can take only several minutes for CO concentration to reach 500 ppm (parts per million), a dose that could be fatal.

Lethal CO2 dose is much higher than CO. People can normally start to feel "something wrong" when CO2 concentration reaches above 20,000 ppm. Near instantaneous human deaths have been recorded for CO2 levels above 200,000 ppm.

Now, to answer your question: if a person is riding at the back of the truck and there is no exhaust leak to spew fumes into the truck, then the person should be okay. The risk of danger would even be lower if the truck was moving, so there is circulation of fresh air to dissipate the pollutants.

No. It will actually help you build up an immunity to carbon dioxide and then you will be able to breathe better in all types of environments. You should definitely try it.

Big YES, carbon iv oxide kills, though not as sulphur iv oxide. In 1964 if am not mistaken more than 1000 died in cameroun due to an outburst of super heated carbon iv oxide from a lake.

If you pump enough in. But, you probably need at least 10% carbon dioxide if you want to get rid of them quickly. ;)

>>>could desire to anthropogenic acidification of the sea certainly be a larger project <<< the sea is under no circumstances "acidic". The PH is approximately 8.2 the sea is in an alkaline state. remember, in elementary terms 4 areas of CO2 exist for each 10,000 areas of atmosphere, and below one in all those has been extra via guy. maximum scientists have faith it extremely is closer to a million/2. the sea has been changing CO2 with the ambience for billions of years. The cycle feels like this... various the CO2 interior the sea finally unites with H20 to sort carbonic acid.. H2CO3. this is an analogous acid this is on your softdrinks.. burb! That carbonic acid finally exhibits between the numerous trillions of single Ca ions interior the "salty as in Ca-Cl2" ocean. They bond like rabbits interior the warmth, to make CaCO3 - regularly interior the type of coral, yet CO2 additionally bonds with assorted different minerals to sort many different C based compounds. That coral finally dies, compresses and morphs into limestone. as long as there is rain, there'll be sufficient mineral ions attainable for this to ensue. by using fact the trillions of gallons of clean water falling on land makes it thank you to the sea, it leaches minerals from the soil. as a consequence, as long as there is rain, there is, and continuously would be much extra Ca and different minerals attainable to bind up the wee little bit of CO2 this is being extra to the sea each 365 days. in elementary terms for a 2nd evaluate what number billions of quite some minerals are being carried to the sea each 365 days via the Amazon, Congo, or Mississippi. The theory of "ocean acidification" is the nuttiest of all claims being made via international hysterics. it could be staggering if a number of those international reactionaries could spend some hours appearing some hassle-free examine. This ain't rocket technology, even even though it does require extra attempt than does making a peanut butter sandwich.

i think corruption and population big problem more then carbon dioxide, because every country to trying solve this problem

yes