By Duke Staff On Oct. 14, more than 170 countries, including the United States, signed an agreement in Kigali, Rwanda to ban the use of greenhouse gas chemicals called hydrofluorocarbons, which are used as coolants in refrigerators and air conditioners. This deal will have a huge impact on slowing the progression of global warming, according to climate-change research website Carbon Brief. The deal took several … Continue reading Small steps in saving the world