The person will have breath his last in a few seconds and die.
If you did not have any oxygen you would die very soon.
droughts happen when there is a spell of very dry weather when there is very little rain
Methane + Oxygen > Carbon (soot) + Water
very, very, very, very, very, very, very little, like and unmeasurable amount.
Same thing that "happens" now. Oxygen does have a color. It's a very, very pale blue (this is NOT why the sky is blue, though).
There is very little you can do - however it is very very unlikely that this will happen.
it would be highly likely that the person has ADHD
Yes, they can't take so much intake of oxygen. Usually they get very little because they have to get it through their gills. They have adapted to getting little oxygen.
We'd all die, except for the tree's. Tree's change CO2 (Carbondioxide) into O2 (Oxygen) so this situation is very very unlikely.
There would be no woods, forests and very little shade.
Blood with co2...
the ability to breathe under water with very little oxygen