I saw and shared this Great British bake off nobody likes a soggy bottom shirt a few weeks back. For me, seeing a group of children work to solve a real-world problem through trial and error, creative thinking, teamwork and perseverance are darn close to being as important as the fact that they succeeded. Innovation is the key to a better, brighter future for all of us but, you are right, we need to continue to question both the processes and the outcome because this will lead to even greater improvements. She is asking what kind of chemicals are used to change it into activated carbon. He said with the right temperature and chemicals they made it happen. What kind of chemicals?