The U.S. may be on the verge of an economy driven by methane, the primary component of natural gas, which burns cleaner than coal and is undergoing a production boom. It has poised the country as a top fuel producer globally, but recent research is casting serious doubts over just how climate friendly it is, according to an article in Chemical & Engineering News (C&EN).
Iron is present in tiny concentrations in seawater, on the order of a few billionths of a gram in a liter. However, its availability in seawater can have a profound effect on phytoplankton growth and, consequently, the Earth's carbon cycle. In recent research, an assessment was made of the various sources of dissolved iron in the north Atlantic Ocean and surprising discoveries were made about their origins.
According to a team of researchers who applied a statistical technique to conventional, coarse-scale climate models, population centers in cool, highland regions of East Africa could be more vulnerable to malaria than previously thought, while population centers in hot, lowland areas could be less vulnerable. The new approach improves the accuracy of earlier efforts that used global climate model simulations results.
Scientists are shedding new light on how invasion by exotic plant species affects the ability of soil to store greenhouse gases. New research shows that invasive plants can accelerate the greenhouse effect by releasing carbon stored in soil into the atmosphere. Since soil stores more carbon than both the atmosphere and terrestrial vegetation combined, agricultural land management could dramatically affect carbon storage.
Whenever there is a major spill of oil into water, the two tend to mix into a suspension of tiny droplets, called an emulsion, that is extremely hard to separate and can cause severe damage to ecosystems. A new membrane developed by Massachusetts Institute of Technology researchers can separate even these highly mixed fine oil-spill residues.
Plastic junk is floating widely on the world's oceans, but there's less of it than expected, a study says. A newly published study drew on results from an around-the-world cruise by a research ship that towed a mesh net at 141 sites, as well as other studies. Researchers estimated the total amount of floating plastic debris in open ocean at 7,000 to 35,000 tons.
In Pennsylvania's gas drilling boom, newer and unconventional wells leak far more often than older and traditional ones, according to a study of state inspection reports for 41,000 wells. The results suggest that leaks of methane could be a problem for drilling across the nation, but the research is being criticized by the energy industry.
The antibacterial properties of silver-coated textiles are popular in the fields of sport and medicine. A team in Switzerland has now investigated how different silver coatings behave in the washing machine, and they have discovered something important: textiles with nano-coatings release fewer nano-particles into the washing water than those with normal coatings.
Space may appear empty, a soundless vacuum. But it's not an absolute void. It flows with electric activity that is not visible to our eyes. NASA is developing plans to send humans to an asteroid, and wants to know more about the electrical environment explorers will encounter there. A new computer model can now predict and visualize the interaction between the solar wind, solar radiation and the surface of asteroids in unprecedented detail.
Fossil fuel emissions release billions of tons of carbon into the atmosphere each year. In Brazil, the demand for alternative energy sources has led to an increase in biofuel crops. New research demonstrates the high carbon costs of converting intact Brazilian savanna compared to the carbon gains obtained from converting underutilized pastureland for biofuel crops.
The chemical makeup of wastewater generated by “hydrofracking” could cause the release of tiny particles in soils that often strongly bind heavy metals and pollutants, exacerbating the environmental risks during accidental spills, Cornell Univ. researchers have found.
Federal regulators want to hear from companies using engineered micro-particles in their products, part of an effort to stay abreast of the growing field of nanotechnology. The U.S. Food and Drug Administration issued final recommendations Tuesday for companies using nanotechnology in products regulated by the government, which can include medical therapies, food and cosmetics.
In the last 40 years, ice loss from the Greenland Ice Sheet increased four-fold contributing to one-quarter of global sea level rise. Some of the increased melting at the surface of the ice sheet is due to a warmer atmosphere, but the ocean’s role in driving ice loss largely remains a mystery. Research by U.S. scientists sheds new light on the connection between the ocean and Greenland’s outlet glaciers.
A new survey suggests asthma in the U.S. may finally be on the decline. But the results are so surprising that health officials are cautious about claiming a downturn. The findings come from a large national health survey conducted last year. The drop could just be an unexplained statistical blip.
Superman isn't the only one who can see through solid surfaces. In a development that could revolutionize the management of precious groundwater around the world, Stanford Univ. researchers have pioneered the use of satellites to accurately measure levels of water stored hundreds of feet below ground.
Nanoparticles are becoming ubiquitous in food packaging, personal care products and are even being added to food directly. But the health and environmental effects of these tiny additives have remained largely unknown. A new study now suggests that nanomaterials in food and drinks could interfere with digestive cells and lead to the release of the potentially harmful substances to the environment.
It’s likely that most of the large impact craters on Earth have already been discovered and that others have been erased, according to a new calculation by a pair of Purdue Univ. graduate students. Although it's known that natural processes erase craters fairly quickly from the Earth's surface, this model was the first to quantify how many craters have likely been erased.
A moderate earthquake shook northwest Alaska on Monday, the fifth temblor of the same magnitude since April in an area with otherwise little activity, seismologists said. The swarm of magnitude-5.7 quakes is connected to more than 300 smaller aftershocks, some with magnitudes in the high 3s, Ruppert said. The series of earthquakes has scientists puzzled about activity that is considered very unusual in the region of Noatak.
Soil pollution causes severe environmental and economic impacts, as well as risks for the human health and ecosystems. The closure of mining and industrial facilities in many sites across Europe has revealed large amounts of contaminated land with uncertain future uses. Decontaminating and recovering such soil is a long, complex and expensive process, which places a large burden on enterprises or public administrations.
Beneath the barren whiteness of Greenland, a mysterious world has popped into view. Using ice-penetrating radar, researchers have discovered ragged blocks of ice as tall as city skyscrapers and as wide as the island of Manhattan at the bottom of the ice sheet, apparently formed as water beneath the ice refreezes and warps the surrounding ice upwards. The newly revealed forms may help scientists understand more about how ice sheets behave.
Two outpost offices of the National Weather Service in Alaska are finally ending what has been a bygone practice for most of the nation for almost two decades: using real human voices in radio forecast broadcasts. Local weather forecasts are a big deal to many people in Alaska because, more than in some other parts of the United States, the forecasts can be a matter of life and death.
More Americans view global warming by what they see outside their windows and not scientific evidence, according to a Univ. of Michigan survey. While a majority of Americans still believe that global warming is occurring, the cold and snowy winter of 2014 created more disbelievers, according to the National Surveys on Energy and Environment.
Researchers report evidence for an oceans worth of water deep beneath the U.S. Though not in the familiar liquid form—the ingredients for water are bound up in rock deep in the Earth’s mantle—the discovery may represent the planet’s largest water reservoir. The presence of liquid water on the surface is what makes our “blue planet” habitable, and scientists have tried to figure out just how much water may be cycling between Earth’s surface.
Years after the 2010 Deepwater Horizon Oil spill, oil continues to wash ashore as oil-soaked “sand patties,” persists in salt marshes abutting the Gulf of Mexico, and questions remain about how much oil has been deposited on the seafloor. Scientists have developed a unique way to fingerprint oil, even after most of it has degraded, and to assess how it changes over time.
A study published by Michigan State Univ. researchers this week concludes that helping farmers around the globe apply more precise amounts of fertilizer nitrogen can combat climate change. The study uses data from around the world to show that emissions of nitrous oxide, a greenhouse gas produced in soil following nitrogen addition, rise faster than previously expected when fertilizer rates exceed crop needs.