Chemical weapons would cause immense civilian casualties in a war.
CrisisGroup9 (Crisis Group Asia Report N°168, North Korea’s Nuclear and Missile Programs, 18 June 2009, North Korea: Getting Back to Talks, 18 June 2009 http://www.nautilus.org/fora/security/09051CICG.pdf)KM
North Korea’s chemical and biological weapons programs pose serious security threats that require immediate and sustained international efforts to eliminate them. The Six-Party Talks have focused on the nuclear weapons program, and although the participants are committed to establishing a peace mechanism in North East Asia, they are not addressing either the chemical or the biological programs. While the North projects a menacing image, it faces challenges of food, energy and economic insecurity and a deteriorating conventional arms balance. These present opportunities for issue linkages, even a grand security bargain, but the negotiations will be daunting. Pyongyang’s chemical weapons arsenal is sufficient to cause huge civilian casualties in South Korea. The evidence of the arsenal seems irrefutable, but Pyongyang denies the existence of any chemical or biological weapons programs. North Korean media proclaim the DPRK is threatened by non-existent South Korean and U.S. chemical and biological weapons. This indoctrination extends to KPA soldiers in the form of CW defence training, even though Seoul signed the CWC and has destroyed its CW stocks.
CBW’s Impact – Bioweapons Bad
Uncontained bioattack leads to extinction – this outweighs nuclear war
Ochs 2(Richard Ochs, ANALYST FOR THE CHEMICAL WEAPONS WORKING GROUP, July 9 2002 -- “BIOLOGICAL WEAPONS MUST BE ABOLISHED IMMEDIATELY” -- http://www.freefromterror.net/other_articles/abolish.html)
Of all the weapons of mass destruction, the genetically engineered biological weapons, many without a known cure or vaccine, are an extreme danger to the continued survival of life on earth. Any perceived military value or deterrence pales in comparison to the great risk these weapons pose just sitting in vials in laboratories. While a "nuclear winter," resulting from a massive exchange of nuclear weapons, could also kill off most of life on earth and severely compromise the health of future generations, they are easier to control. Biological weapons, on the other hand, can get out of control very easily, as the recent anthrax attacks has demonstrated. There is no way to guarantee the security of these doomsday weapons because very tiny amounts can be stolen or accidentally released and then grow or be grown to horrendous proportions. The Black Death of the Middle Ages would be small in comparison to the potential damage bioweapons could cause. Abolition of chemical weapons is less of a priority because, while they can also kill millions of people outright, their persistence in the environment would be less than nuclear or biological agents or more localized. Hence, chemical weapons would have a lesser effect on future generations of innocent people and the natural environment. Like the Holocaust, once a localized chemical extermination is over, it is over. With nuclear and biological weapons, the killing will probably never end. Radioactive elements last tens of thousands of years and will keep causing cancers virtually forever. Potentially worse than that, bio-engineered agents by the hundreds with no known cure could wreck even greater calamity on the human race than could persistent radiation. AIDS and ebola viruses are just a small example of recently emerging plagues with no known cure or vaccine. Can we imagine hundreds of such plagues? HUMAN EXTINCTION IS NOW POSSIBLE.
CBW’s – US-China Relations Module
Conflict over North Korea kills any stability in relations between China and the US. Friedberg5 (Friedberg, Aaron L., Professor of Politics and International Affairs at Princeton University, International Security, Volume 30, Number 2, Fall 2005, pp. 44-45)
The physical image of roughly balanced opposing forces suggests a degree of tension and potential instability. In such circumstances a change on one side or the other can yield dramatic, discontinuous shifts. Such possibilities exist in the political world as well. With reference once again to the end of the U.S.- Soviet Cold War, it is possible to imagine that a sudden breakthrough toward domestic political reform in China could open the way for radically improved relations with the United States. At the same time, however, it is conceivable that an unanticipated or mismanaged crisis (over Taiwan, for example, or North Korea, or in South Asia) could lead to the opposite result. If the United States and China were somehow to lurch from constrained competition to direct confrontation, their relationship would be transformed overnight. Trade and diplomacy would be disrupted; hostile images would harden; domestic political reform in China might be derailed; and the prospect of a genuine entente between the two Pacific powers could be put off for a generation or even more.
Second Korean War would drag in China as an enemy of the US. Karlin10 (Anatoly Karlin, March 28, 2010 http://www.sublimeoblivion.com/2010/03/28/korean-war-2/)KM
Crossing the DMZ with the intention of toppling the DPRK and replacing it with a government allied with or integrated into South Korea will put a whole set of new dynamics into play. Though China has no intention of aiding North Korea in aggression, it views the establishment of an American bridgehead on its Manchurian border with trepidation and may intervene under extreme circumstances, such as an all-out American and South Korean drive for “regime change” in Pyongyang. If this were to happen, all bets are off. China will probably be able to roll back the invasion forces to the DMZ. After all, it managed to do this in the 1950′s, when it was much more militarily backwards relative to the US. Now, it will have a big preponderance over land, while its new “carrier-killing” ballistic missiles, submarines, cruise missiles, and Flanker fighters are now, at some level, able to deny the seas off China to the US Navy, while its anti-satellite tests and cyberwar prowess means that the American dominance in space and information ought not be taken for granted either. Now I am not saying that the Chinese Army (it ceased by the People’s Liberation Army recently) comes anywhere close to matching the American military; however, it might well already have the ability to defeat it in a local war on China’s borders. If China is successful, it will re-establish North Korea as its own protectorate, although under someone more rational and reliable than Kim Jong-il (though needless to say this will also completely sever its economic relationship with the US and cause a severe, but temporary, economic contraction due to the collapse of its export sector).