Ron Patalano, director of operations at Roger Williams Park Zoo, has high praise for his staff. After all, it takes a mighty amount of shoveling to fill the two 30-yard Dumpsters of animal excrement that are hauled away weekly as part of the zoo’s recycling program.

Added to the grass clippings, vegetable scraps, animal bedding, hay and other natural materials trucked to Earth Care Farm in Charleston for composting, are 624 tons of manure produced annually by the zoo’s 280 inhabitants.

Keeping yards and buildings waste free “is not an easy job,” Patalano noted.

The zoo’s relationship with Earth Care Farm — Rhode Island’s longtime composting mecca — goes back at least 15 years, according to John Barth, the farm’s manager.

The “surfactant” chemicals found in samples of fracking fluid collected in five states were no more toxic than substances commonly found in homes, according to a first-of-its-kind analysis by researchers at the University of Colorado Boulder.

Fracking fluid is largely comprised of water and sand, but oil and gas companies also add a variety of other chemicals, including anti-bacterial agents, corrosion inhibitors and surfactants. Surfactants reduce the surface tension between water and oil, allowing for more oil to be extracted from porous rock underground.

Naturally occurring asbestos minerals may be more widespread than previously thought, with newly discovered sources now identified within the Las Vegas metropolitan area. The asbestos-rich areas are in locations not previously considered to be at risk, according to new report that will be presented at the Annual Meeting of the Geological Society of America (GSA) in Vancouver, Canada, on Sunday, 20 October.

"These minerals were found where one wouldn't expect or think to look," said Rodney Metcalf, associate professor of geology at the University of Nevada, Las Vegas, and co-researcher of the study. The naturally occurring asbestos was found in Boulder City, Nevada, in the path of a construction zone to build a multi-million dollar highway called the Boulder City Bypass, the first stage of an I-11 corridor planned between Las Vegas and Arizona.

Researchers from the UK have called into question a theory suggesting that a previously reported risk of leukemia among children born close to overhead power lines could be caused by an alteration to surrounding air pollution. In a study published today, 31 October, in the Journal of Radiological Protection (the official journal of The Society for Radiological Protection), the researchers have found little evidence to support the ‘corona-ion hypothesis’ which has been cited as a possible explanation for the excess of childhood leukemia cases close to high-voltage overhead power lines in the UK prior to the 1980s.

If the majority of light-duty vehicles in the United States ran on higher-octane gasoline, the automotive industry as a whole would reduce its carbon dioxide emissions by 35 million tons per year, saving up to $6 billion in fuel costs, according to a new analysis by MIT researchers.

In a study published in the journal Environmental Science & Technology, the team considered a scenario in which fuel is manufactured under a redefined octane rating — the measure of a gasoline’s ability to resist engine knocking during combustion.