Hemp and marijuana are both plants of the species, Cannabis sativa. The distinction is more a legal one than it is biological. The 2018 Federal Farm Bill created a somewhat arbitrary threshold of 0.3% Δ9-THC on a dry weight basis that differentiates the two. Under this system, when Cannabis is grown by a Hemp permit holder that tests below 0.3% Δ9, it is fully Federally legal and called hemp. Hemp-based products can contain up to 0.3% Δ9-THC legally. While this appears negligible, a finished product with any significant weight can contain a significant dose of THC. The term Marijuana is a common American word for illicit cannabis with troubling origins. It gained popularity in the early 20th century during a period of anti-cannabis sentiment and propaganda campaigns. It was used to associate the plant with Mexican immigrants to add negative racial and cultural connotations to its use.