1. Benzene: A slightly yellow or colorless chemical. It is highly dangerous and can halt red blood cell production as well as cause cancers.
2. Formaldehyde: A highly dangerous chemical substance that can cause cancers or lead to rashes, irritation of the nose and throat, and wheezing.
3. Allergens: Substances that can cause allergic reactions, such as pollen or dust.
4. Pests: Harmful organisms that can negatively impact the growth of plants or animals.
5. Infection: An attack on an individual’s immune system caused by germs like viruses or bacteria.
6. Propagate: Breeding baby plants or new plants from vegetative or non-reproductive portions (i.e., root, shoot, or leaves) of a parent plant