toxics

Presto Change-o

Frogs are changing genders — and it ain’t just to Halloween getup. The most popular weed-killer in the U.S. is causing sex changes in frogs, according to a summary of a new study published today in Nature. The study, led by Tyrone Hayes, a biologist with the University of California at Berkeley, contains the first […]

In the Drink

In other news from the Golden State, regulators in California are reviving a campaign to clean up perchlorate, a Cold War-era pollutant that has been showing up in drinking water supplies across the country. Since the 1950s, the substance has been used as an oxidizer in rockets, munitions, and fireworks. It was not considered particularly […]

Umbra on wooden pallets

Dear Umbra, I’ve scrounged some old wooden shipping pallets for garden projects — compost piles and raised planting boxes. They appear to be untreated wood, but I’m feeling paranoid. Is there any way to know? Do companies that make pallets routinely spray them with any preservatives? Thanks,Jim Dearest Jim, Great nations consider your humble garden […]

A back-to-school lesson in consumption

Kindergarten is starting next week, and the worn-out old sneakers from last spring are pinching my daughter’s toes. No shoes fit at our favorite used-clothing store, and no neighbors have the right pair of outgrown sneakers to offer this season. There is no avoiding it. One morning, as early as I can manage, I load […]

Umbra on diesel engines

Dear Umbra, Longtime reader; first-time writer. Love the column. My partner and I recently bought a small station wagon to replace our 4WD pick-up and ’83 sedan. After some debate, we chose a turbo-diesel engine that boasts about 45 miles per gallon instead of a gas engine, which gets about 30 MPG. Our thinking led […]

Umbra on weeding

Dear Umbra, We moved into a suburban neighborhood in Ft. Collins, Colo., last year and I began my usual organic gardening practices. I created a beautiful flower garden in our front yard, but I still receive complaints from my neighbors because I refuse to apply herbicides to kill the dandelions and other weeds in the […]

Umbra on lawn and garden pesticides

Dearest Umbra, Goddess of Green Knowledge, A few years ago, a farmer friend of mine argued that more pesticides and chemical fertilizers are applied to suburban lawns and gardens than are used in commercial agriculture. I can see how this might be the case, given the massive size of the lawn and garden chemical industry, […]

Umbra on clothing

Dear Umbra, My nephew says that new clothes and other apparel that come from foreign countries are treated with toxic chemicals to avoid various types of fungal or insect contamination, and upon arriving at the loading dock of your favorite wanker-mart, they are ripe to toxify the air, your skin, your eyes. He worked on […]

Frog Days of Summer

For the first time, scientists have found evidence linking agricultural runoff to the rise in grotesque hind-limb deformities in frogs. In the past, the deformities were associated with a common parasite, the burrowing trematode worm, which seemed to affect the development of tadpoles. Now, writing in this week’s issue of the Proceedings of the National […]