No_Assumption_6028 t1_j3ukedv wrote on January 11, 2023 at 3:54 AM

Reply to comment by Ardashasaur in Milkdromeda. by Acuate187

You're right, I meant to say breathable air and CO2/signs of an industrial society. I wonder how we would confirm an advanced civilization if we 100% detected these things.

Ardashasaur t1_j3uu2wu wrote on January 11, 2023 at 5:15 AM

I don't think it could be confirmed by atmosphere alone, no telling how an atmosphere is composed on an alien planet. Detecting something like CFCs would be a really strong sign but still not 100% if there is some wacky geological process or unknown reactions from alien elements.

Edit: that being said focusing on a planet with CFCs in atmosphere would still be really cool anyway