What Happens When Oxygen Levels Change Due to Global Warming
Oxygen seems to exist infinitely in the air. We learned in school that oxygen makes up roughly 21% of our atmosphere. But what would happen if this ratio were to shift? Global warming is changing the concentration of atmospheric oxygen. Burning fossil fuels directly consumes oxygen from the air on a continuous basis. However, an even greater problem lies in the oceans. As global warming raises ocean temperatures, gas solubility drops, causing dissolved oxygen in the water to plummet. Marine phytoplankton—responsible for producing nearly 70% of the Earth's oxygen—face severe threats of extinction due to rising temperatures and disrupted ocean circulation. Coupled with severe droughts and massive wildfires destroying forests (often called the "lungs of the Earth"), the planet's entire oxygen replenishment loop is under serious strain. If the oxygen ratio drops significantly , complex organisms will gradually vanish. Only certain anaerobic microorganisms and resilient m...