Passage: North Korea has a military nuclear weapons program and also has a significant quantity of chemical and biological weapons. As of 2003, North Korea is no longer a party to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). The country has come under sanctions after conducting a number of nuclear tests, beginning in 2006.

Question: Besides nuclear weapons, what other types of weapons of mass destruction does North Korea produce a lot of?
chemical and biological