ENVIRONMENT More than 170 countries have agreed to limit emissions of key pollutants found in air conditioners, a significant step in the effort to keep climate change from reaching catastrophic levels. (Time) How do greenhouse gases cause atmospheric warming? Use our activity to find out. Teachers, scroll down for a quick list of key resources in our Teachers Toolkit. Discussion Ideas More than 170 nations … Continue reading What Makes the Kigali Agreement so ‘Monumental’ for Climate Change?