The product should have a label containing instruction for use and warnings if need be.
the poisonous gases
If a spider bites you and you get sick it is poisonous.
if it has a diamond shape head it is poisonous
Carbon Monoxide.
yes
Eat it
Frogs that are very brilliantly and brightly colored are poisonous, and usually dull colored ones are not poisonous.
yes! they don't know what's poisonous and what's not.
VENUS
because it is a waste-product and is poisonous in excessive concentrations.
Carbon monoxide (CO)
most product are said to be nontoxic.