Mana gave an overview of green chemistry, Paul Anastas and John Warner’s 12 principles of green chemistry, followed by a description of Advancing Green Chemistry’s involvement in the field.
Mana: “The discussion that followed after the lecture was phenomenal! Almost everyone who attended the lecture asked a question. I had never seen such an involved group of students!”
We started off discussing endocrine disrupting chemicals, for example: bisphenol A (BPA). What exposure level is safe? Really large amounts are harmful, but so are really tiny amounts – the correlation is not linear. We proceeded to discuss how we could test compounds for toxicity if the correlation is not linear. This led to a discussion on general methods for testing for toxicity, what the current standards are and how we could do better. We discussed the ethical concerns around animal testing and other tools.
The students were curious to find out what some of the common sources of BPA exposure are, and were surprised to find out that it is found in many disposable water bottles and plastic containers. A concerned student then asked for advice on how to avoid BPA. The response was: don’t use plastic food containers – but if you do, definitely do not microwave food in them because that allows the BPA and other contaminants to leach into your food. Store food in glass jars instead.
The ladies in the crowd then opened a discussion on cosmetics. Like many, they had never considered the chemicals in their beauty products. We talked about how many chapsticks and lip balms have oxybenzone in them – a component that acts as a sunscreen but is also a carcinogen. Most girls in the room immediately reached for their chapsticks to look at ingredients. A hand darted up to ask me “My chapstick has 6% oxybenzone – should I throw it away?” From this topic we went on to discuss how many sunscreen components do not degrade and go into our rivers and affect the reproductive anatomy of frogs and fish. This then led to how effects on amphibians predict effects on humans.
Needless to say, the conversation was great – filled with great facts, questions, and laughs!