Wisconsin lake study shows persistence of acid rain effects
...arge part thanks to the Clean Air Act's capping of sulfur dioxide emissions. But that good news is tempered by the evidence from Little Rock that lakes recover slowly from biological changes driven by acidity. Frost says other studies of northeast U.S. lakes have found little improvement in pH levels. The...Taking the pulse of giants: Detecting change and its consequences in western mountain ecosystems
...reducing particles; the deposition of nitrogen and sulfur compounds; and ozone. Air pollution threats to species, biogeochemical processes, and human health will be outlined in her presentation. Emerging air pollution issues include elevated concentrations of persistent organic pollutants in snow, the infl...Trans-pacific air pollution is worse than was suspected,says new study
...rmland. While releases of one key type of aerosol, sulfur dioxide,have been decreasing in the United States ...ill said.Between 1990 and 2000, annual releases of sulfur dioxide intothe atmosphere in the United States dropped from about 20million tons to 13 tons, but in...Scientists look to nature to cut greenhouse emissions
...the researchers are exploring ways to reduce toxic sulfur emissions by changing the chemical composition of the exhaust gas, and are developing a new device that could more efficiently collect additional heavy metal particles from the exhaust stream....Acid rain revisited: ESA releases report on the ecological response to acid deposition
... reductions of annual emissions of its precursors, sulfur dioxide (SO2) and nitrogen oxides (NOx). The scien...ast, the scientists agreed, emission reductions of sulfur dioxide correspond to decreases in the fluxes of sulfate in both precipitation and surface waters. ...Mountains of variables: The effect of landscape features on atmospheric deposition
...st floor have been found to correlate closely with sulfur and nitrogen deposition, the two main ingredients ...al deposition, and related those patterns to total sulfur and nitrogen deposition. When examining the effect that forest edges had on total deposition, the te...Acid-loving microbe may be a key to mine pollution
...air and water and geochemically impacting iron and sulfur cycles. But under the conditions created by the mining of metal ores, where many tons or ores and tailings are exposed, the organism thrives and revs up the production of sulfuric acid. "It speeds up environmental damage," says Banfield, an authorit...Study: Methane cleans nitric oxide from power plant emissions
...e, methane, oxygen, water, and sulfur dioxide -- for this part of the experiment. ...ere with the reaction, but the sulfur dioxide did. Over 6 hours, it rendered the catalyst partially inactive, and lowe...Common algae can be valuable source of hydrogen fuel
...rom the microalga growth medium." The absence of sulfur stops photosynthesis and thus halts the cell's int...rink, to stoppered one-liter glass bottles with no sulfur present. Then, the culture is allowed to consume away all oxygen. After about 24 hours, photosynth...China now leads world in sulfur emissions, study shows
... West to the East. An ambitious analysis of global sulfur emissions estimates spanning two centuries shows t...ons over the past 20 years, while mainland China's sulfur emissions have soared. China now leads the world in the dubious distinction of most sulfur emission...Koehler awarded NSF grant for study of atmospheric gases
...nd jet aircraft. Scientists have discovered that sulfur from jet fuel is converted into sulfuric acid more... chemistry a few years ago. Koehler has found that sulfur dioxide adsorbs (sticks) to laboratory-produced soot and will explore whether this is a possible exp...Eastern U.S. benefits from emissions trading by power plants
Study indicates sulfur dioxide emissions shifting from Northeast to Midwe...ower plants to trade, sell and bank allowances for sulfur dioxideemissions as a way for plants to hold down the cost of pollution reduction. Sulfur dioxide (S...Atmospheric carbon monoxide levels decreasing in mid-Atlantic region
... conditions, ultraviolet light penetration, ozone, sulfur dioxide, andreactive nitrogen compounds in the air. The researchers attribute the decrease in carbon monoxide largely to reductionsin manmade emissions, consistent with trends in emissions reported by the U.S.Environmental Protection Agency (EPA) and...Ship sulfur emissions found to strongly impact worldwide ocean and coastal pollution
...ental impacts of ship sulfuremissions. Regionally, sulfur emissions contribute to acid rain, which canpollut...ortant for coastal cities that receivethe brunt of sulfur pollution from ships. This study was funded by a grant from the National Science Foundation...Microbial janitors tackle nuclear clean-up problems
...ers' work. As the microbes metabolize anelemental sulfur nutrient source, they create sulfuric acid. The s...the lemon curd you spread on atea-time scone. The sulfur not only feeds the microbes, the bright color makesthe gel easy to see, a plus when applying it to a...Smog impacts: Hurtling through airways, tiny particles may do more damage than previously assumed
...ne particles also can be generated by gases suchas sulfur dioxide, nitrogen oxides and volatile organic compounds. When they float solo, these particles are so small, they can't be seen without amicroscope. Yet, clusters of fine particles produce clouds of dust, black sootand gray haze. And, when ground-le...Massive pollution documented over Indian Ocean
...ng carbon monoxide, various organic compounds, and sulfur dioxide,providing conclusive evidence that the haze layer is caused by pollution. Asia and the Indian subcontinent, which together have a population ofmore than 2 billion people, emit large quantities of pollutants that can becarried to the I...New Biochemical Technology Ready To Retrieve, Purify Heaviest Crude Oil
...ks. Lab-scale tests have shown they reduceorganic sulfur and nitrogen concentrations by up to 40 percent, and metals by upto 50 percent. Through carefully controlled conditions, the biocatalysts can be adapted to theexact characteristics of different forms of crude oil, whether from California,Mexico, Vene......ecently to be mutuallyexclusive in the ocean: the sulfur and nitrogen cycles. The finding is describedin th...ur Pearl of Namibia." The microbes store elemental sulfur justunder the cell wall as well as nitrate in a huge central sac, which shines withan opalesque, blu...The Largest Bacterium: Scientist Discovers New Bacterial Life Form Off The African Coast
... Bay (Namibia), and shine whitebecause microscopic sulfur granules, which they store inside, reflect theinci...his trick for an extensive and dense population of sulfur storingbacteria living along the Pacific coast of South America. The cells of thesefilamentous bacte...