if something emits something else then that something ray the endocrine of that something else
pollutant is tangible_thing. burnt_thing is tangible_thing. imprinted_thing is tangible_thing. light_thing is tangible_thing. pollutant is not tangible_thing. odorless_thing is tangible_thing. imprinted_thing is not tangible_thing. anucleated_cell is not tangible_thing. burnt_thing is not tangible_thing. anucleated_cell is tangible_thing.