@mold @lucy @lizzie whenever i hear “lena” i think of this en.wikipedia.org/wiki/New_England_Compounding_Center_meningitis_outbreak
@lucy @eemmaa @lizzie @arcana @mold not really. and the visible part depends on what’s combusting. some fuel-air mixtures for example burn with an invisible flame and very little radiant heat, so you’ll only notice the fire when you’re already standing in it (which some fuel enigineers had to find out the hard way)