That green trend might be your skin mutating

When, in the 1960s, I started to talk about "paper recycling" to my students, I was seen as a Don Quixote by my peers.

Recycling was so costly at the time that it wasn't worth it. It took 25 years before people became used to the reality of recycling paper. Through the decades, recycling efforts have been made around the globe. "Green" has become a common adjective when talking about industrial production as well as food production.

Despite their high prices, "green" light bulbs or energy-saving bulbs have become accepted and popular. In China, they now light millions of Chinese households. But suddenly and recently, it's come to light that these bulbs can cause a high level of mercury pollution.