Board Thread:Supergirl discussions/@comment-9346948-20170124011043/@comment-32509213-20170126202937

Diagonally33 wrote: J'onn said Maaldoria has nitrogen in the air which is toxic to martians. High level of nitrogen is poisonous to humans, so how did they survive there? Earth air also has nitrogen, so how is J'onn alive? He said Maaldoria has silicates in the air, not nitrogen. And our real life Earth has about 78% nitrogen in our atmosphere so it's not lethal to humans unless its the only thing in an atmosphere.

As for scientific accuracy, I'm pretty sure silicates are found on Earth mostly as rock minerals, not gaseous, so I'm not sure what to make of that. (After a quick browsing of Wikipedia, silicate clouds only form in super-hot gas giant planets.)