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Our atmosphere is a combination of many gases such as Nitrogen which represent 78% of the atmosphere, 20.9% is oxygen, and the rest are some gases like carbon dioxide and Argon.

But what if the earth has an atmosphere with pure oxygen?
Well it seems it is good for us, because it is necessary to survive, but what if we told that you are wrong? Here are the reasons why an atmosphere with pure oxygen is bad for us.

1. Giant Insects  


300 million years ago, insects were huge thanks to the atmosphere, at that time oxygen was up to 35% compared to the 20.9% now, scientists have found fossils of insects like dragonfly and it wingspan reached about 2 feet (24 inch) (60 cm) long, so we will be on their food list.

2. We Wont Make It 


If atmosphere became pure oxygen instantly, breathing will be harder and painful, our lungs will be filled with fluids, and by continuing to breathe, lungs and brain get damaged, until our body shut-down from Hyperoxia. 

3.Too Much Oxygen For Us Will Cause Free Radicals 


Even If our bodies can withstand that atmosphere, breathing too much oxygen for a long time, will cause free radicals or basically unstable atoms that damage our cells, they are the reasons behind many diseases like Alzheimer and aging, so we will look older in a short time. In addition, they are also associated with cancer and coronary artery disease.

 4. We shouldn’t use fire anymore 


Let’s say we likely survived, lighting a fire will end the earth, if you set a fire everything will be on fire, oxygen or O2 is the fuel of the fire, if there is too much oxygen the fire will spread in a humongous explosion. 



What If Earth’s Atmosphere Was 100% Oxygen?


Our atmosphere is a combination of many gases such as Nitrogen which represent 78% of the atmosphere, 20.9% is oxygen, and the rest are some gases like carbon dioxide and Argon.

But what if the earth has an atmosphere with pure oxygen?
Well it seems it is good for us, because it is necessary to survive, but what if we told that you are wrong? Here are the reasons why an atmosphere with pure oxygen is bad for us.

1. Giant Insects  


300 million years ago, insects were huge thanks to the atmosphere, at that time oxygen was up to 35% compared to the 20.9% now, scientists have found fossils of insects like dragonfly and it wingspan reached about 2 feet (24 inch) (60 cm) long, so we will be on their food list.

2. We Wont Make It 


If atmosphere became pure oxygen instantly, breathing will be harder and painful, our lungs will be filled with fluids, and by continuing to breathe, lungs and brain get damaged, until our body shut-down from Hyperoxia. 

3.Too Much Oxygen For Us Will Cause Free Radicals 


Even If our bodies can withstand that atmosphere, breathing too much oxygen for a long time, will cause free radicals or basically unstable atoms that damage our cells, they are the reasons behind many diseases like Alzheimer and aging, so we will look older in a short time. In addition, they are also associated with cancer and coronary artery disease.

 4. We shouldn’t use fire anymore 


Let’s say we likely survived, lighting a fire will end the earth, if you set a fire everything will be on fire, oxygen or O2 is the fuel of the fire, if there is too much oxygen the fire will spread in a humongous explosion. 



Science