*Three sentences may not be sufficient but here goes: 
 **Per NPOV, alternative views should be respectfully included  and this means both political and scientific views. 
 **The topic is complex and the lengthy issues could be handled better by dividing them up: Science of Global Warming, Politics of Global Warming, Mediation Efforts for Global Warming, etc. with one page as a summary to sub articles and detailed discussion of the "debates" on the sub articles. 
 **A lot of hard work has gone into the article by a select group of people with a strong point of view  leading to  Ownership issues and egregious hostility to other editors.