Most people worry about the quality of the air they breathe outdoors, while giving little thought to the contaminants that may be circulating in their own homes. Yet, with only a few exceptions, such as certain urban environments, "outdoor air is cleaner than indoor air," says Andrea Ferro, an ass. prof. in civil and environmental engineering at Clarkson Univ.
A recent study is the first to show that corals are not able to fully acclimate to low...
A new study on the feeding habits of ocean microbes calls into question the potential...
Technology exists for removing heavy metals from drinking water, but often is too...
A “cold snap” 116 million years ago triggered a similar marine ecosystem crisis to the ones witnessed in the past as a result of global warming, according to recently published research. The international study confirms the link between global cooling and a crash in the marine ecosystem during the mid-Cretaceous greenhouse period.
The Agriculture Dept. says it has no indications that genetically modified wheat found in the western state of Oregon last month has spread beyond the field in which it was found. No genetically engineered wheat has been approved for U.S. farming, and the department is investigating how the engineered wheat got in the field.
Making cars more fuel-efficient is great for reducing greenhouse gas emissions, but rather than promoting sales of electric and other alternative-fuel vehicles, policymakers should turn their focus to cutting emissions in other energy sectors—from oil wells and power plants to farms and forests affected by biofuels production—says a Univ. of Michigan researcher.
Humans began contributing to environmental lead pollution as early as 8,000 years ago, according to a Univ. of Pittsburgh research report. The Pitt research team detected the oldest-discovered remains of human-derived lead pollution in the world in the northernmost region of Michigan, suggesting metal pollution from mining and other human activities appeared far earlier in North America than in Europe, Asia and South America.
At the Advanced Light Source, scientists analyzed samples from a Roman breakwater that has been submerged in the Bay of Naples for over two millennia, revealing the secrets of crystal chemistry that allow Roman seawater concrete to resist chemical attack and wave action for centuries. The manufacture of extraordinarily durable Roman maritime concrete released much less carbon than most modern concrete does today.
Univ. of Calgary scientists are investigating how 'Alberta-grown' biomass—such as straw and wood left over from agricultural and forestry operations—could be used to clean up chemical contaminants in water from oilsands operations. This research project received $57,500 from the Climate Change and Emissions Management (CCEMC) Corp. though the Biological Greenhouse Gas Management Program.
In this video, Tim Samaras from the National Geographic Channel Storm Chasers talks about his passion for chasing and studying storm systems. He explains how he used National Instruments’ (NI) LabVIEW and CompactDAQ in a new instrument that is deployed on the ground in front of a tornado. After the storm he uses another NI application, DIAdem, to view the data that was collected.
If the climate continues to evolve as predicted by the Intergovernmental Panel on Climate Change, the United States stands little to no chance of satisfying its current biofuel goals, according to a new study by Rice Univ. and the Univ. of California, Davis. The recently published study suggests that in 40 years, a hotter planet would cut the yield of corn grown for ethanol in the U.S. by an average of 7%.
The European Union is urging its 27 member states to test certain wheat shipments from the United States after unauthorized genetically modified grains were found on a U.S. farm, officials said Friday. The move came after Japan halted imports Thursday of some types of wheat from the U.S. following the discovery of an experimental strain that was tested by Monsanto but was never approved.
According to a new study led by the University of Colorado Boulder, a chemical reaction between iron-containing minerals and water may produce enough hydrogen "food" to sustain microbial communities living in pores and cracks within the enormous volume of rock below the ocean floor and parts of the continents.
Stromatolites (“layered rocks”) are structures made of calcium carbonate and shaped by the actions of photosynthetic cyanobacteria and other microbes that trapped and bound grains of coastal sediment into fine layers. According to recent research, the widespread and mysterious disappearance of stromatolites may have been driven by single-celled organisms called foraminifera.
On Tuesday, the National Weather Service gave the recent Moore, Okla., tornado the top-of-the-scale rating of EF5 for wind speed and breadth, and severity of damage. Wind speeds were estimated at between 200 and 210 mph. Everything had to come together just perfectly to create this killer tornado: wind speed, moisture in the air, temperature, and timing.
An international team of researchers may have found what cause a dramatic cooling near the end of the last major Ice Age more than 12,000 years ago. The recently published study, which involved the study of rock melted into carbon spherules, describes evidence of a major cosmic event near the end of the Ice Age. The ensuing climate change forced many species to adapt or die.
The planets Uranus and Neptune are home to extreme winds blowing at speeds of over 1,000 km/hour, hurricane-like storms as large around as Earth, immense weather systems that last for years, and fast-flowing jet streams. Researchers using a new method for analyzing the gravitational field of these planets have determined an upper limit for the thickness of the atmospheric layer, which limits the depth of stormy weather.
Among its many talents, silver is an antibiotic. Titanium dioxide is known to glom on to certain heavy metals and pollutants. Other materials do the same for salt. In recent years, environmental engineers have sought to disinfect, depollute, and desalinate contaminated water using nanoscale particles of these active materials. Engineers call them nanoscavengers.
Scientists sampling 127 shallow drinking water wells in areas overlying Fayetteville Shale gas production in north-central Arkansas found no evidence of groundwater contamination. The team of scientists at Duke University and the U.S. Geological Survey (USGS) analyzed the samples for major and trace elements and hydrocarbons, and used isotopic tracers to identify the sources of possible contaminants.
Sulfur dioxide has been pegged as a significant cooling element in atmospheric climate models because of its ability to form sulfate aerosol particles that reflect sunlight. Recent findings from a team suggest that it is likely most models overestimate the cooling effect of these particles. The reason is a largely disregarded reaction pathway catalyzed by mineral dust within clouds.
Detecting greenhouse gases in the atmosphere could soon become far easier with the help of an innovative technique developed by a team at NIST, where scientists have overcome an issue preventing the effective use of lasers to rapidly scan samples. The team says the technique also could work for other jobs that require gas detection, including the search for hidden explosives and monitoring chemical processes in industry and the environment.
Researchers studying the origin of cirrus clouds have found that these thin, wispy trails of ice crystals are formed primarily on dust particles and some unusual combinations of metal particles—both of which may be influenced by human activities. The findings are important, scientists say, because cirrus clouds cover as much as one-third of the Earth and play an important role in global climate.
Researchers have cautioned that more work is needed to understand how microorganisms respond to the disinfecting properties of silver nanoparticles, increasingly used in consumer goods and for medical and environmental applications. Although nanosilver has effective antimicrobial properties against certain pathogens, overexposure to silver nanoparticles can cause other potentially harmful organisms to rapidly adapt and flourish.
University of Manchester scientists, writing in Nature Geoscience, have shown that natural emissions and manmade pollutants can both have an unexpected cooling effect on the world’s climate by making clouds brighter. Clouds are made of water droplets, condensed on to tiny particles suspended in the air. When the air is humid enough, the particles swell into cloud droplets.
The growing global demand for energy, combined with a need to reduce emissions and lessen the effects of climate change, has increased focus on cleaner energy sources. But what unintended consequences could these cleaner sources have on the changing climate? Researchers at Massachusetts Institute of Technology now have some answers to that question, using biofuels as a test case.
All forms of life that breathe oxygen—even ones that can't be seen with the naked eye, such as bacteria—must fight oxidants to live. These same oxidants also exist in the environment. But neutralizing environmental oxidants such as superoxide was a worry only for organisms that dwell in sunlight—in habitats that cover a mere 5% of the planet. Now researchers have discovered the first light-independent source of superoxide.
For the first time, researchers from institutions around the country have conducted an identical series of toxicology tests evaluating lung-related health impacts associated with widely used engineered nanomaterials (ENMs). The study provides comparable health risk data from multiple laboratories, which should help regulators develop policies to protect workers and consumers who come into contact with ENMs.
t's a chemical that's been in U.S. households for more than 40 years, from the body wash in your bathroom shower to the knives on your kitchen counter to the bedding in your baby's basinet. But federal health regulators are just now deciding whether triclosan—the germ-killing ingredient found in an estimated 75% of antibacterial liquid soaps and body washes sold in the U.S.—is ineffective, or worse, harmful.