if something emits something else then that something increases the amount of that something else
pollutant is tangible_thing. burnt_thing is tangible_thing. change is when_one_thing_becomes_another_thing. harshness is not tangible_thing. pollutant is not tangible_thing. all_things has not impact_on_other_things all_things has impact_on_other_things change is not when_one_thing_becomes_another_thing. burnt_thing is not tangible_thing. harshness is tangible_thing.