Turning Low-Value Plastic Materials Into High-Value Molecules
If you thought those flimsy disposable plastic grocery bags represented most of our plastic waste problem, think again. The volume of plastic the world throws away every year could rebuild the Ming Dynasty’s Great Wall of China – about 3,700 miles long.
In the six decades that plastic has been manufactured for commercial uses, more than 8.3 billion metric tons have been produced. Plastics are light, versatile, cheap and nearly indestructible (as long as they don’t get too hot). These properties make them incredibly useful in an enormous range of applications that includes sterile food packaging, energy-efficient transportation, textiles and medical protective gear. But their indestructible nature comes at a cost. Most of them decompose extremely slowly in the environment – on the order of...