#serpentinite

Meta Description (SEO: within 155 characters) Explore how serpentinite-rich soil in Tajima, Japan, influences rice farming. A 10,000-character deep dive into geology, agriculture, and culture. Main SEO Keywords (naturally embedded in the text) serpentinite rice farming / Tajima serpentinite soil / organic rice farming features / Tajima rice taste / serpentinite soil characteristics / natural…

Inspired by a poll, everyone who follows me gets to look at a rock per day for the month of October! 

The increasing number of wildfires is linked to the effects of climate change. The increasing presence of a carcinogen is a result of those fires.

It's widely known that wildfire smoke is bad for your health, but a group of researchers recently found a known carcinogen in California wildfire ash, raising concerns about just how harmful it could be to breathe the air near a blaze. According to a study released in Nature Communications last week, researchers discovered dangerous levels of hexavalent chromium in samples of ash left behind by the Kincade and Hennessey fires in 2019 and 2020. Workers in the manufacturing industry who've been exposed to elevated levels of hexavalent chromium,or chromium 6, have higher rates of lung cancer, according to the National Institute of Environmental Health Sciences. Scott Fendorf, a professor at the Doerr School of Sustainability at Stanford University who worked on the study, said he was shocked by the results. "Up until that point, if we had a wildfire, I was pretty cavalier about it, to be truthful. We get the alerts and I would still go outside and exercise, thinking exercise was the better factor for my health," Fendorf said. "Now it completely changes my calculation. When we start to get wildfire warnings or smoke warnings, I'm going to be wearing an N95 mask." In some affected areas, the study found that the concentration of chromium 6 was up to seven times that of unburned land. [ ... ] Metals such as chromium naturally exist in the environment, such as in rocks like serpentinite. In this case, Fendorf said, the wildfires' intense heat appears to have transformed chromium into its hexavalent state. "The fire changes a benign metal into a very toxic form of that metal," he said. Hexavalent chromium is also known as the "Erin Brockovich chemical," named for the consumer advocate whose legal battle to help a small California town affected by the compound was immortalized in a now famous film starring Julia Roberts. The Stanford team only tested ash from several areas in California, but Fendorf said the test sites contained various types of geology and vegetation, leading researchers to believe the results would be applicable to many regions across the globe. The study's findings also open the door to further investigation of possible wildfire exposure risks for other toxic metals.

The simplistic view of climate change is that Earth's thermostat is just being turned up. But as CO2 and other greenhouse gases increase, a complex series of chain reactions is taking place. The spread of hexavalent chromium is another product of those reactions.

Marble souvenir "Rat on a log"

Questa piccola cascata se ne sta nascosta ed incassata in un anfratto che l’acqua si è scavata in un verde blocco di roccia ofiolitica lungo il piccolo torrente noto con il nome di Rio delle Marne, presso Ghiare di Berceto, in Val Taro. Questo torrente è perlopiù un fiume di fango il cui corso trova come unico ostacolo questo sbarramento di roccia nella quale ha scavato la piccola cascata.