over a trillion. basically everyone and everything on earth that is living.
People breathe out because we need to breathe fresh air, and if we kept the same air in our bodies it would not be fresh after a while, and we would die.
Yes. We breathe air all the time. If we didn't we would asphyxiate and die.
You breathe correclty by just letting the air have time to fill your lungs and then exhale. Don't breathe too fast, and no too slow. Many people like myself breathe slower when they sleep.
No people do not have the right to breathe in your air, as it's not public use you could sue these people who do that and when you are done suing people you go and celebrate, your case winning in court!! Good luck suing people who aren't allowed to breathe in your air !! ;)
It depends on what area you are in. Like if you are in China, there are many people there is a lot of factories there.
The air that people breathe in a cycle of the earth
Well only if you are a spirit or a ghost. In order for you to talk you have to breathe. And in order for you to breathe you have to have air. So, no if there is no air in the room people cannot hear a word you are saying.
On average, humans breathe in about 21% oxygen from the air.
well people breathe air every day so you can survive with holding your breath for about 30 seconds
Fish breathe with gills. By the way, whales do not. They breathe air, because they are mammals.
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People recycle because it is good for the air we breathe I think they are too lazy to put things in the recycle bin