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The United Nations was formed after World War II to rebuild a war-torn Europe and is based in the Netherlands. The United Nations works with other countries to prevent future international crisis situations. The United Nations is considered one of the foremost authorities in world government, and it opens its doors to every country in the world. While the United Nations has limited abilities to go to war, it is commonly involved as a neutral third party in protecting citizens involved in international conflicts such as humanitarian aid projects that create refugee camps. The United Nations is frequently in science news for promoting the reduction of greenhouse gases worldwide and creating treaties between countries to reduce global warming.