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A recent study highlights the bleak future of Earth's atmospheric oxygen levels, predicting a significant drop billions of years from now. According to researchers, the planet may face conditions reminiscent of the Archean Earth era, when oxygen levels were drastically lower than today. This alarming scenario could unfold rapidly, similar to the Great Oxidation Event that occurred over 2.4 billion years ago, ushering in early forms of life.
The decline in oxygen is attributed to a combination of natural global warming and human-induced climate change. Scientists suggest that if current trends continue, oxygen levels could fall almost a million times lower than today's standards. This decline poses a severe threat to life as we know it, particularly for species dependent on oxygen, including humans.
Looking ahead, researchers emphasize that addressing immediate climate issues remains essential, though they acknowledge the eventuality of Earth's inhospitable future. The sun is predicted to reach the end of its lifecycle in approximately two billion years, marking a definitive end to all life within our solar system, unless humanity successfully relocates to another planet, such as Mars.