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Tag: "cities" at biology news

Youth With HIV Take More Risks After New Meds Introduced

... 1994 and 1996 with 175 teens with HIV in the same cities between 1999 and 2000. Although the two groups did not include the same people, the groups were very similar in terms of sex, age, race and ethnicity and other socioeconomic characteristics. The 1999-2000 post-HAART group was almost twice as likely ...

Are rice and wheat behind China's population boom?

The rapid growth of the earliest cities in northern China starting as far back as 2400 to 2000 BC is the result of successful rice farming combined with other crops, says University of Toronto anthropologist Gary Crawford. Although we often associate rice with Chinese agriculture, most ar...

Ebola virus: from wildlife to dogs

...o foci of the outbreaks. From 9 % in the two large cities of Gabon, antibody prevalence goes up to 25 % in the untouched villages of the epidemic area, reaching 32 % in the villages where human cases have been attributed to an infected-animal source. These domestic animals could therefore become infected an...

New Scripps Oceanography project to study sediments and ecosystem restoration in Venice lagoon

...or for Scripps. "Venice is one of the most popular cities in the world and Italy's safeguarding measures--including the Mose floodgates system for the defense against high tides--are considered some of the most ambitious projects of the 21st century. So being part of this lagoon preservation effort is being...

Past droughts geographically widespread in the West, according to tree-ring data

...nt of Water Resources, Central Arizona Project and cities in the Phoenix metropolitan area. The tree-ring study in partnership with The University of Arizona is the one of many initiatives taken by SRP in response to an ongoing drought that is in its 10th year. Even counting this past winter when 2,017,580...

Toxic flood lifts lid on common urban pollution problem

... in New Orleans also highlights the need for other cities nationwide to do more to remove the toxins in urba...ater flooding control and other benefits. Finally, cities can use high-tech street sweeping equipment that is very effective at capturing pavement contaminant...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

...pollutants from their various sources to populated cities and towns around the globe, NASA technologists are exploring an innovative technology called the "sensor web." This interconnected "web of sensors" coordinates observations by spacecraft, airborne instruments and ground-based data-collecting stations...

Environmental lessons from tsunami as world's coastal population doubles

... next twenty five years as people flock to coastal cities ?many these being Asian cities. To compound this, many weather-related disasters are becoming more destructive and intense due to climate change. The report is based on two case studies ?the Asian tsunami in 2004 and the impact of severe storms in ...

Researcher says flu responders can learn from 1918 epidemic

...is research efforts on the ability of Pennsylvania cities to respond. "Those cities that passed muster, relatively speaking, had been building a strong medical infrastructure for decad...

Restaurant seafood prices since 1850s help plot marine harvests through history

...tion-adjusted seafood prices from menus, most from cities such as New York, Boston and San Francisco. The menus shed light on shifting tastes for and supplies of such popular seafood as lobster, swordfish, abalone, oysters, halibut, haddock and sole. Though still at an early stage, the research already sho...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...d about six-fold since pre-industrial times and in cities above a thousand times more NOX is present than in the pristine and remote marine boundary layer. Exposure to nitrogen dioxide in large quantities is known to cause lung damage and respiratory problems, although little is known about the consequenc...

UCR environmental scientists propose chemical solution to cleaning California's Salton Sea

...y values in an area that is easily accessible from cities such as Los Angeles, San Diego and Riverside. An improvement of the environmental conditions in the Salton Sea region also could facilitate the region's development as a water-sports recreational area. Currently, state and federal agencies are worki...

Pollutant haze heats the Arctic

...e ?made of particulate pollution from mid-latitude cities ?mixes with thin clouds, making them better able to trap heat. The effect makes the Arctic 2 degrees to 3 degrees Fahrenheit warmer during polluted, cloudy episodes than it would be if the air was clean, concludes the study by Tim Garrett, an assi...

Air travel and pandemic flu

...break was under way, banning flights from affected cities would be effective at significantly delaying worldwide spread only if almost all travel between cities could be stopped almost as soon as an outbreak was detected in each city. It would be more effective...

China's environmental challenges

...diversity in China's mountains. Focusing on major cities such as Shanghai, Shuqing Zhao (Peking University) and colleagues discuss the major challenges faced by Chinese policy makers in managing the tradeoffs between urbanization and environmental protection. Meanwhile, the country's mountainous regions s...

Study finds the air rich with bacteria

...g the bacteria in air samples taken from the Texas cities of San Antonio and Austin. Surprisingly, they foun... they chose Austin and San Antonio because the two cities have similar population densities, elevation and topography, and they are only about 100 kilometers ...

Air travel and flu: Post-9/11 restrictions delayed start of season

...rnment records on deaths from flu and pneumonia in cities from nine regions of the US between 1996 and 2005. For each year, they determined the time it took for the epidemic to spread across the country and the date of the national peak in flu deaths. They used government estimates of passenger air travel t...

Cities change the songs of birds

...e possibility that in general, great tits in noisy cities sing higher than great tits in quieter forests: In...ongs undergo a habitat-dependent acoustic shift in cities that is driven by traffic noise. With the new findings, Slabbekoorn and den Boer-Visser confirm ...

Male contraception: One door opens, another closes

...r demand, the trial has been expanded to four U.S. cities and can accept 90 participants. Similar approaches have been shown to work in men in studies in China and India. Stresses Lissner, "Only public pressure can get researchers the funding they need to see which of these leads is going to work out." ...

Endangered shortnose sturgeon saved in Hudson River

...hreatened species, even next to one of the busiest cities in the world. ...

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