Beer is a rich source of a nutrient that can help prevent weak bones – but it depends what type you drink, claim researchers at University of California, Davis, today.

As one of the nation’s favourite tipples, beer is a rich source of dietary silicon, which can help cut the chance of developing diseases like osteoporosis, they conclude.

However, not all beers are the same, with those containing malted barley and hops having higher silicon content than beers made from wheat.

Some light lagers made from grains like corn have the lowest levels of silicon while beers made from hops seem to come out on top, according to the study. The research, published in the Journal of the Science of Food and Agriculture, examined 100 commercial beers and their production methods.

The experts said beer was a major source of dietary silicon – roughly half of the silicon in beer can be readily absorbed by the body.

Keep reading at The Guardian.

In the wake of the Port-au-Prince earthquake, Haitians have sustained an immense loss of life, with numbers still climbing, and the collapse of physical structures signifying the collapse of the governmental, social, economic, and infrastructural institutions those structures housed and represented. Many of those institutions and infrastructures were weak before the quake, as Haiti is among the world’s poorest nations, reliant on international aid and subject to severe economic disparity.

This earthquake was no typical disaster, and Haiti is no typical disaster-struck region. In many ways, Port-au-Prince and its institutions required rebuilding before the buildings collapsed. The relief effort of this particular disaster goes beyond air-dropping supplies and building emergency housing. Haiti also requires an emergency economic system (the banks and tax office have collapsed), an emergency medical system (hospitals have collapsed), an emergency justice system (courthouses and the federal prison have collapsed), emergency education (schools have collapsed), and an emergency government (the parliament and many ministry buildings have collapsed). People talk about emergency shelter. What about emergency institutions, only one of which is housing?

Participants in February’s Spontaneous Architecture competition are invited to take this question seriously, enacting a response onto the site included below. The site includes multiple institutions and social, economic, and governmental infrastructures as well as residential areas and open space parks currently being used as campsites for those in need of housing. Participants are asked to consider one or all of the institutions present and can operate on the entire site or a specific portion thereof. Responses can be strategic, organizational, institutional, and/or architectural.

Enter the competition here>

Cities are particularly vulnerable to climate change because they are warmer than outlying rural areas. Asphalt roads, tar roofs, and other artificial surfaces absorb heat from the Sun, creating an urban heat island effect that can raise temperatures on average by 2-5 degrees Fahrenheit (about 1-3 degrees Celsius) or more compared to rural areas. White roofs would reflect some of that heat back into space and cool temperatures, much as wearing a white shirt on a sunny day can be cooler than wearing a dark shirt.
The study team used a newly developed computer model to simulate the amount of solar radiation that is absorbed or reflected by urban surfaces. The model simulations, which provide scientists with an idealized view of different types of cities around the world, indicate that, if every roof were entirely painted white, the urban heat island effect could be reduced by 33 percent. This would cool the world’s cities by an average of about 0.7 degrees F, with the cooling influence particularly pronounced during the day, especially in summer.

Read the rest of the article.

China has also leapfrogged the West in the last two years to emerge as the world’s largest manufacturer of solar panels. And the country is pushing equally hard to build nuclear reactors and the most efficient types of coal power plants.

These efforts to dominate renewable energy technologies raise the prospect that the West may someday trade its dependence on oil from the Mideast for a reliance on solar panels, wind turbines and other gear manufactured in China.
…
China’s top leaders are intensely focused on energy policy: on Wednesday, the government announced the creation of a National Energy Commission composed of cabinet ministers as a “superministry” led by Prime Minister Wen Jiabao himself.

Regulators have set mandates for power generation companies to use more renewable energy. Generous subsidies for consumers to install their own solar panels or solar water heaters have produced flurries of activity on rooftops across China.

“People who don’t wear shoes when they run have an astonishingly different strike,” says Daniel E. Lieberman, professor of human evolutionary biology at Harvard University and co-author of a paper appearing this week in the journal Nature. “By landing on the middle or front of the foot, barefoot runners have almost no impact collision, much less than most shod runners generate when they heel-strike. Most people today think barefoot running is dangerous and hurts, but actually you can run barefoot on the world’s hardest surfaces without the slightest discomfort and pain. All you need is a few calluses to avoid roughing up the skin of the foot. Further, it might be less injurious than the way some people run in shoes.”
Working with populations of runners in the United States and Kenya, Lieberman and his colleagues at Harvard, the University of Glasgow, and Moi University looked at the running gaits of three groups: those who had always run barefoot, those who had always worn shoes, and those who had converted to barefoot running from shod running. The researchers found a striking pattern.

Keep reading at Science Daily.

“Our vision is for a zero waste UK; a country where we rethink our rubbish and start to view it as a resource rather than a waste product,” the Strausses write on their website, MyZeroWaste. “Our belief is that a zero waste Britain is possible if more energy, money and care is put into education, innovative product design and recycling facilities.”

OK, so that’s the why. But what about the how? How does a three-person household cuts its trash footprint so dramatically while still keeping up a typical British living standard?

The Strausses go into great detail on their website. Step one, obviously: Reduce, for which they recommend everything from buying in bulk to simply removing the kitchen bin (“The out of sight out of mind approach … “). Step two: Reuse (turning used coffee grounds into snail and slug repellant, taking their own food containers to the butcher’s shop, wrapping gifts with junk mail). Step three: Recycle (even sending their empty crisp packets to a Philippine charity that turns them into wallets, bags and purses).

Keep reading at greenbang

We can all benefit from this research into renewable energy sources for disaster recovery.

Solar setups are quick to install, mobile, and relatively inexpensive compared to the price of rebuilding a damaged electricity grid. They can also be incredibly robust. Alan Doyle, a science editor at MSNBC, recently wrote that a single solar water purification system, recovered from the rubble by the Red Cross, is now purifying 30,000 gallons (over 110,000 liters) of water a day.

Sol Inc, a US-based solar street lighting company, has sent a first shipment of lights for roadways, food distribution, and triage sites. This may sound mundane, until you imagine trying to perform street-side surgery or find family members in the dark. The LED lights can also withstand hurricane force winds – no small thing in a country that has also recently been hit by tropical cyclones. Sol Inc has promised to match donations for people wanting to contribute to the program.

Communications are another crucial need being met by solar. China’s ZTE corporation has donated 1,500 solar cellphones and 300 digital trunking base stations. The same technology was used in China when an earthquake hit the Sichuan Province in May of 2008. A similar project is being set up by a group from Holland.

Renewable energy in Haiti is not a new. Walt Ratterman, CEO of non-profit SunEnergy Power International was working on the electrification of Haitian hospitals at the time of the quake. He is currently still missing.

Keep reading at WorldChanging.

If anyone knows that there’s value in trash, it’s Waste Management — the big waste hauler collects 66 million tons of it every year. So the company has teamed up with a small venture-backed company that has developed a system that can break down some of that trash fast and turn it into natural gas, electricity, compost or all of the above, making some of that trash even more valuable.

Waste Management announced today it has invested in Harvest Power and will develop projects with the company. Harvest builds giant digesters — think of them as cow stomachs — that speed up the composting process. By creating conditions that the bugs that break down organic matter thrive in — a little warmth, a little moisture — and mixing it up to keep the process going, Havest can speed the natural composting process to six to eight weeks from double that. The output? No hamburgers, milk or leather, but otherwise the same as what you’d get from a cow: natural gas and good fertilizer.

Keep reading at Forbes.