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How many protons should be added to the nuclei of oxygen atoms so the resulting gas will glow red when there is an electric current through it?
Endangered Species
Species at risk of extinction due to a rapid decrease in population or loss of habitat, often caused by human activities.
Threatened Species
Plants, animals, or microbes at risk of becoming endangered within the foreseeable future throughout all or a significant portion of their habitat.
Imported Species
Species that are introduced into new environments by human activities, intentionally or accidentally.
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