Think all chemicals are bad? From our food to your phone, modern life relies on them

By Timothy Schmidt, UNSW Sydney, Jason Dutton, La Trobe University

The icebreaker of many a barbeque conversation is something like “what do you do for a crust?”

“I teach chemistry at university,” is what we usually reply. Then silence. Our new friend will usually go on to say they either hated or did terribly in chemistry at school.

Or, depending on what’s been in the news lately, they might start talking about parabens in shampoo, or BPA in plastic poisoning our dogs, or the “forever chemicals” PFAS in everything.

Chemistry, it must be admitted, has an image problem.

Chemistry’s image problem

By the age of six, many children already have negative feelings about the word “chemical”.

Ask the average person what a chemical is, and they’re likely to tell you it’s something bad. Products advertise themselves as “chemical-free” – an assertion that makes no scientific sense (since everything in the world is made of chemicals) but resonates with the consumer.

The media often doesn’t help chemistry’s image. Positive news stories about science are often about a breakthrough cure for some disease, years before it might eventually be approved for use in patients, or the latest nifty-looking thing we’ve noticed up in space.

Stories about chemistry, on the other hand, are often negative: toxic chemical spill from train derailment; ammonia leak sparks evacuation; residents told to stay inside as warehouse fire spreads toxic smoke.

The modern world is built on chemistry

However, everyone in the world owes much of their present standard of living to advances made by chemists. Without the Haber-Bosch process for creating fertiliser from nitrogen in the air, half the world’s population would not have enough to eat. All modern medicines, from aspirin to RNA vaccines, owe their discovery to chemistry.

The lithium batteries that enable so many portable electronic devices – yep, chemistry. We could go on.

And indeed we will.

Read Full Story https://theconversation.com/think-all-chemicals-are-bad-from-our-food-to-your-phone-modern-life-relies-on-them-227768