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More and more people live on Earth each year. How is this impacting the planet?

I'm doing it on one the Earth's subsystems which is air. Please help and give me a link to wear you found the information, thanks!

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Air is not a critical resource for our population. Neither is water; distribution of clean water is an issue, but water per se isn't an issue. This is because the volume of air and fresh water is sufficient for about 100 billion people; Greenland alone could supply enough fresh water for the whole world.
Plants, fungi and some water plankton are good at scrubbing CO2 from the atmosphere and returning oxygen to the atmosphere. It's entirely renewable and does not require the intervention of man.
The current estimates of world population are that, absent a catastrophe, we will peak at about 10-12 billion people around 2050 ad, and start a slow decline after that; this is due to predictable fecundity rates and death rates that are already in motion. Food for this many can be produced on current agriculture land; if global warming opens up parts of the Russian tundra and Canadian wilderness to winter wheat, there should be no real problem with feeding 12 billion, assuming we can distribute well.

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Look up generation of the fig tree and it may shed some light. The first shall be last and the last shall be first

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Yeah and more and more people die each year on earth

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