It’s perceptual, so when we inhale oxygen and nitrogen and the other trace compounds that are in the air (like ozone, co2, argon, etc) we don’t smell anything because those chemicals aren’t harmful or meaningful for us. Our senses are there to find food and avoid danger.
Likewise, a visitor to our planet might think the air reaks of ozone because maybe it would be harmful to their biology. Similarly, we might complain about a planet that has a high concentration of acetic acid (vinegar) in their oceans even though they might be horrified by our salty oceans.
It’s perceptual, so when we inhale oxygen and nitrogen and the other trace compounds that are in the air (like ozone, co2, argon, etc) we don’t smell anything because those chemicals aren’t harmful or meaningful for us. Our senses are there to find food and avoid danger.
Likewise, a visitor to our planet might think the air reaks of ozone because maybe it would be harmful to their biology. Similarly, we might complain about a planet that has a high concentration of acetic acid (vinegar) in their oceans even though they might be horrified by our salty oceans.