ENVIRONMENT The Smog Free Tower has arrived in China, bringing clean air and diamonds. Yes, diamonds. (Voice of America) What is smog? What are diamonds? Use our resources to find out. Teachers, scroll down for a quick list of key resources in our Teachers Toolkit. Discussion Ideas The Smog Free Tower uses innovative technology and beautiful design to create a “bubble of clean air.” What … Continue reading Giant Air Purifier Creates a Breath of Fresh Air