The Obama administration has officially banned any new uranium mines in the land adjacent to the Grand Canyon for the next 20 years. During the vizuka.com Bush presidency, mining companies filed thousands of new land claims in northern Arizona near the national park. In 2009, Secretary Salazar ordered a temporary ban on any new claims, but now those lands are safe for at least 20 years.
The ban protects one million acres of land surrounding the Grand Canyon from new mining claims, but the 3,200 existing mines will not be affected and best prices for levitra 11 new mines already under construction will be allowed to continue to develop.
Although this ban seems like a no-brainer, there was a decent amount of levitra delivered overnight opposition since the price for uranium is high and the area is rich in uranium deposits. This ban doesn't just protect the beauty of the cialis pfizer 50 mg place, but more importantly the health of the ecosystems and millions of people who live within the Colorado River Basin. At least one creek in the park has been found to be contaminated by uranium and high levels of arsenic have been found in the area from old mining operations.
According to the AP, GM is encouraging Volt drivers to bring their vehicle into a dealer where mechanics will "strengthen the structure around the batteries." Extra steel will be added to the plates that surround the batteries making them better protected during an impact and preventing any coolant leaks that were the where can i purchase cialis cause of the crash test fires. The fix has been confirmed by the National Highway Traffic Safety Agency.
This isn't a formal recall, but affects about 8,000 cars out on the road and another 4,400 for sale.
Initially after the test fires, GM offered Volt drivers an opportunity to sell back their cars or to be provided a loaner replacement. To prevent fires after any real-world crashes, GM has been sending out teams to www.ncitech.co.uk drain batteries after being notified by the vehicles' OnStar system.
If you wanted something else to blame on the internal combustion engine, you can now add tornadoes and only here usa levitra hailstorms to the list. Scientists have found that both weather events are more likely to occur during the week than the weekend due to the higher levels of pollution in the air from our workday commutes.
The study, published in the Journal of zvezdegranda.rs Geophysical Research - Atmospheres, looked at summer storm patterns in the eastern U.S. from 1995 to 2009 and found that hailstorms were occurring at a rate of about 20 percent above average midweek and about 20 percent below average on Saturday and Sunday. The team then looked at EPA records of summertime air pollution in the eastern U.S. and found that it peaks midweek.
The reason is that water particles cling to pollutants in the air, floating up higher in the atmosphere where it's colder and creating more hail. Pollutants also create tornado-friendly conditions by making the http://roguelephant.com/cialis-next-day air warmer.
The western U.S. doesn't experience this same phenomenon since the air is dryer and cloud masses are too high and cold for the air pollution to interfere with.
Grid parity in cost between solar power and grid-supplied electricity is likely to begin being reached in the US in as little as 2 years, and within the next 25 years, many of the largest metropolitan areas will reach the point where solar is less expensive. An animated map from Energy Self Reliant States shows the picture.
This timeline includes no government subsidies in the calculations. It uses a baseine cost of solar power in 2011 at $4.00 per watt, installed. Using the average residential grid supplied electricity price for each metro area, it makes the two assumptions based on present trends to determine when the price of solar drops below grid: the cost of solar decreases by 7% per year, and the grid electricity price increases by 2% per year.
Based on these assumptions, the San Diego CA metropolitan area will be at solar parity in 2013, and within the next 25 years, many of the largest metropolitan areas will reach the point where solar is less expensive.
A concept to turn the Eiffel Tower into a giant green wall has been proposed as a symbolic statement of daily cialis "the reconciliation of nature and mankind."The plan calls for 600,000 plants to be attached to the structure using hemp sacks filled with soil as the growth media. An irrigation system comprising 12 tons of tubing would be used to provide water for the plants.
The installation would not be permanent, and would be removed after a few years. But, once in place, the installation would help remove an estimated 87.8 tons of CO2 from the atmosphere.
"Should it not be the duty of engineers to imagine a new future where nature is brought back into the heart of the city," said a statement from Ginger, the company behind the proposal. With an estimated cost of nearly 100 million dollars for the project, that's more than a million dollars per ton of CO2. Hardly the levitra discount most cost effective carbon sequestration, but certainly a visible one.
A new optical furnace that uses intense light rather than a conventional furnace to heat the silicon to make solar cells saves about half the energy needed. The process uses a furnace with "highly reflective and levitra tadalafil heat-resistant ceramics to ensure that the light is absorbed only by a silicon wafer, not by the walls inside the furnace." The process was developed by scientists at the National Renewable Energy Laboratory (NREL).
In addition to providing improved efficiency in the production of the cells, the optical furnace also does a better job at removing some impurities, which makes for better output from the finished panels. Eventually, researchers on the project believe that this could provide a four percentage point increase in the efficiency of how to get cialis no prescription the solar cells produced with this method.
Photovoltaic technology has taken another step forward as researchers at the National Renewable Energy Laboratory (NREL) have demonstrated a photocell with an external quantum efficiency over 100 percent using quantum dots. The new cell uses a process called Multiple Exciton Generation (MEG) that produces more than one electron-hole pair per absorbed photon, and reached a level of 114 percent.
This development offers the possibility of increased efficiency in solar panels, and the technology is able to be manufactured using high-throughput roll-to-roll manufacturing. With the use of quantum dots, photocells could theoretically see as much as a 35 percent increase in power conversion efficiency above contemporary cells. The research cell was constructed as a "layered cell consisting of antireflection-coated glass with a thin layer of a transparent conductor, a nanostructured zinc oxide layer, a quantum dot layer of lead selenide treated with ethanedithol and hydrazine, and a thin layer of gold for the top electrode."
Note that this does not mean that the entire panel would have a total efficiency above 100% (which would be thermodynamically impossible). The quantum efficiency means only that the number of electron-hole pairs created in the cell is greater than the number of photons that are absorbed. Nonetheless, the advance provided by MEG could lead to the next generation of http://www.beverly.org/best-price-levitra-online even more efficient solar energy collectors.
The ban would include a three-year adjustment period starting in 2013 for retailers and consumers to get prepared where single-use bags could still be purchased at 25 cents each. Once 2016 hits though, only reusable bags would be allowed and that would include City of Austin facilities and all city events.
Some single-use bags would be exempt from the ban, including: restaurant carryout bags, bags for wine and cheapest viagra anywhere beer, dry cleaning bags, newspaper delivery bags and bags that hold meat, fish, produce, bulk foods or pharmaceuticals.
Reusable bags would be defined as bags that are made of fabric or durable materials or thick paper or plastic with some recycled content. The city would pay for an aggressive marketing campaign to get the www.pjr.com word out about the ban with proceeds from the 25 cent fee.
A team of engineers at the University of Illinois have figured out how to create self-healing circuits in electronics and batteries, a discovery that could lead to longer equipment life and make a nice dent in the piles of e-waste plaguing the planet.
As electronics have become more complex, one small circuit failure can render a device useless, especially since it is hard or often impossible to only today usa levitra diagnose where that failure occurred to fix it. Nancy Sottos, an engineer working on the project said:
"In general there's not much avenue for manual repair. Sometimes you just can't get to the inside. In a multilayer integrated circuit, there's no opening it up. Normally you just replace the whole chip. It's true for a battery too. You can't pull a battery apart and try to find the source of levitra best buy the failure."
The solution her team came up with was an army of microcapsules about 10 microns in diameter dispersed along a circuit. When a crack occurs in the circuit, the microcapsules break open and release a liquid metal that fills in the crack and restores the electrical flow. The time between a failure and viagra soft the microcapsules filling the crack is only a few microseconds.
In tests, 90 percent of the samples were healed to 99 percent of their original conductivity. It also require zero human intervention. Only the tramadol cod saturday microcapsules intercepted by a crack opened while the others remained intact.
The engineers see this breakthrough as especially useful for air and spacecraft where miles of conductive wire would have to be gone through to diagnose a failure. The team, which originally used microcapsules to cialis generic canada create self-healing polymers, want to see what other applications they may have.
Now, in time to make us feel all warm and fuzzy during the holiday season, the tech giant has announced that they're investing $94 million in a group of four solar projects by Recurrent Energy. This latest investment brings the total of the company's renewable energy investments to almost $1 billion.
The four solar photovoltaic projects will have a combined capacity of 88 MW and will be located near Sacramento, California. The projects will provide enough power for 13,000 homes. A power purchase agreement has already been signed by the Sacramento Municipal Utility District for 20 years.
In 2011, Germany finally saw their renewable energy production top that of canadian pharmacy ed almost all other sources of energy, including nuclear, hard-coal and gas-fired power plants. The only other energy generation source greater than the renewable energy mix was lignite-fired power.
According to a report from German utility BDEW, renewable energy accounted for 20 percent of the country's total energy output, up from 16.4 percent last year. Lignite-fired output produced 24.6 percent of the electricity.