20% of Earth’s oxygen is produced by the Amazon rain-forest

Explanation:

The Amazon Rain-forest has been described as the "Lungs of our Planet" because it provides the essential environmental world service of continuously recycling carbon dioxide into oxygen. More than 20 percent of the world oxygen is produced in the Amazon Rain-forest. Our atmosphere is made up of roughly 78 per cent nitrogen and 21 per cent oxygen, with various other gases present in small amounts. The vast majority of living organisms on Earth need oxygen to survive, converting it into carbon dioxide as they breathe. Thankfully, plants continually replenish(پورا کرنا) our planet’s oxygen levels through photosynthesis(ضیائی تالیف). During this process, carbon dioxide and water are converted into energy, releasing oxygen as a by-product. Covering 5.5 million square kilometers (2.1 million square miles), the Amazon rain-forest cycles a significant proportion(اہم تناسب) of the Earth’s oxygen, absorbing large quantities of carbon dioxide at the same time.
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