January 20, 2013

New solar cells increase solar panel efficiency by more than 25%

New solar cell (credit: University of Cambridge)

University of Cambridge scientists have developed hybrid solar cells that could increase the maximum efficiency of solar panels by more than 25%.

Typically, a solar cell generates a single electron for each photon captured. They added pentacene, an organic semiconductor, to harness the extra energy of blue light, allowing for generating two electrons for every photon from the blue light spectrum. This could enable the cells to capture up to 44% of the incoming solar energy.

Hybrid photovoltaic device architecture. Infrared photons are absorbed using conventional lead sulfide (PbS) nanocrystals. Visible photons are absorbed in pentacene to create singlet excitons, which undergo rapid exciton fission to produce pairs of triplets. (Credit: ACS)

Ref.: Bruno Ehrler, et al., Singlet Exciton Fission-Sensitized Infrared Quantum Dot Solar Cells, NanoLetters, 2012; [DOI:10.1021/nl204297u]

Corporate Control? Not in These Communities

by Allen D. Kanner from Yes! Magazine

Mt. Shasta, a small northern California town of 3,500 residents nestled in the foothills of magnificent Mount Shasta, is taking on corporate power through an unusual process—democracy.


Citizens of Mt. Shasta, California have developed an ordinance to keep corporations from extracting their water.

Photo by Jill Clardy.

The citizens of Mt. Shasta have developed an extraordinary ordinance, set to be voted on in the next special or general election, that would prohibit corporations such as Nestle and Coca-Cola from extracting water from the local aquifer. But this is only the beginning. The ordinance would also ban energy giant PG&E, and any other corporation, from regional cloud seeding, a process that disrupts weather patterns through the use of toxic chemicals such as silver iodide. More generally, it would refuse to recognize corporate personhood, explicitly place the rights of community and local government above the economic interests of multinational corporations, and recognize the rights of nature to exist, flourish, and evolve.

Mt. Shasta is not alone. Rather, it is part of a (so far) quiet municipal movement making its way across the United States in which communities are directly defying corporate rule and affirming the sovereignty of local government.

Since 1998, more than 125 municipalities have passed ordinances that explicitly put their citizens’ rights ahead of corporate interests, despite the existence of state and federal laws to the contrary. These communities have banned corporations from dumping toxic sludge, building factory farms, mining, and extracting water for bottling. Many have explicitly refused to recognize corporate personhood. Over a dozen townships in Pennsylvania, Maine, and New Hampshire have recognized the right of nature to exist and flourish (as Ecuador just did in its new national constitution). Four municipalities, including Halifax in Virginia, and Mahoney, Shrewsbury, and Packer in Pennsylvania, have passed laws imposing penalties on corporations for chemical trespass, the involuntary introduction of toxic chemicals into the human body.

When the attorney general of Pennsylvania threatened to sue Packer Township for banning sewage sludge within its boundaries, six other Pennsylvania towns adopted similar ordinances.

These communities are beginning to band together. When the attorney general of Pennsylvania threatened to sue Packer Township this year for banning sewage sludge within its boundaries, six other Pennsylvania towns adopted similar ordinances and twenty-three others passed resolutions in support of their neighboring community. Many people were outraged when the attorney general proclaimed, “there is no inalienable right to local self-government.”

Bigger cities are joining the fray. In November, Pittsburgh’s city council voted to ban corporations in the city from drilling for natural gas as a result of local concern about an environmentally devastating practice known as “fracking.” As city councilman Doug Shields stated in a press release, “Many people think that this is only about gas drilling. It’s not—it’s about our authority as a municipal community to say ‘no’ to corporations that will cause damage to our community. It’s about our right to community, [to] local self-government.”

What has driven these communities to such radical action? The typical story involves a handful of local citizens deciding to oppose a corporate practice, such as toxic sludge dumping, which has taken a huge toll on the health, economy, and natural surroundings of their town. After years of fighting for regulatory change, these citizens discover a bitter truth: the U.S. environmental regulatory system consists of a set of interlocking state and federal laws designed by industry to serve corporate interests. With the deck utterly stacked against them, communities are powerless to prevent corporations from destroying the local environment for the sake of profit.

Enter the Community Environmental Legal Defense Fund, a nonprofit public interest law firm that champions a different approach. The firm helps communities draft local ordinances that place the rights of municipalities to govern themselves above corporate rights. Through its Democracy School, which offers seminars across the United States, it provides a detailed analysis of the history of corporate law and environmental regulation that shows a need for a complete overhaul of the system. Armed with this knowledge and with their well-crafted ordinances, citizens are able to return to their communities to begin organizing for the passage of laws such as Mt. Shasta’s proposed ordinance.

The Community Environmental Legal Defense Fund is collaborating with Global Exchange, an international environmental and workers’ rights organization, to help supporters of the Mt. Shasta ordinance organize. In an interview for this article, I asked Shannon Biggs, who directs Global Exchange’s Community Rights Program, if she expected ordinances of this type to be upheld in court. Biggs was dubious about judges “seeing the error of their ways” and reversing a centuries-old trend in which courts grant corporations increased power. Rather, she sees these ordinances as powerful educational and organizing tools that can lead to the major changes necessary to reduce corporate power, put decision-making back in the hands of real people rather than corporate “persons,” and open up whole new areas of rights, such as those of ecosystems and natural communities. Biggs connects the current municipal defiance of existing state and federal law to a long tradition of civil disobedience in the United States, harkening back to Susan B. Anthony illegally casting her ballot, the Underground Railroad flouting slave laws, and civil rights protesters purposely breaking segregation laws.

But the nascent municipal rights movement offers something new in the way of political action. These communities are adopting laws that, taken together, are forming an alternative structure to the global corporate economy. The principles behind these laws can be applied broadly to any area where corporate rights override local self-government or the well-being of the local ecology. The best place to start, I would suggest, is with banning corporations from making campaign contributions to local elections.

The municipal movement could provide one of the most effective routes to building nationwide support for an Environmental and Social Responsibility Amendment to the U.S. Constitution. In fact, the movement is already expanding. In Pennsylvania, people are now organizing on the state level and similar stirrings have been reported in New Hampshire.

What about your community?


Allen D. Kanner, Ph.D., is a cofounder of the Campaign for a Commercial-Free Childhood, co-editor ofPsychology and Consumer Culture and Ecopsychology, and a Berkeley, California child, family, and adult psychologist.

This article originally appeared in Tikkun.

Sources:

https://organicconnectmag.com/wp/corporate-control-not-in-these-communities

https://www.yesmagazine.org/people-power/corporate-control-not-in-these-communities

https://www.tikkun.org/article.php/jan2011kanner

Alien Life Boost After Nasa finds One in Two Suns has Earth-like Planets

The chances of finding alien life have been given a boost after it was revealed that one in two stars in the universe have Earth like planets orbiting around them.

The news came from NASA scientists studying the results from the Kepler telescope which in its first two years in space has found evidence of more than 1,200 planets in orbit around far distant stars.

The early findings suggests that there are triple the number of known planets outside our own solar system - 54 of them are Earth size and in the habitable zones from their suns.

Only two potentially habitable planets have previously been found outside earth’s solar system, so Kepler scientists are very excited at finding so many possible candidate planets.

Speaking at the American Association for the Advancement of Science, Kepler chief scientist William Borucki said: “I am really delighted that we are seeing so many candidate planets and that means there is a rich ocean of planets out there to explore.

“For every two stars we are seeing a candidate planet.”

The next step is to send out new telescopes to see if the atmospheres of the planets, that are between 30 and 100 light years away, have friendly atmospheres on which life could survive.

It is another big step to prove that a confirmed planet has some of the basic conditions needed to support life, such as the proper size, composition, temperature and distance from its star.

More advanced aspects of habitability such as specific atmospheric conditions and the presence of water and carbon require telescopes that are not built yet.

Source: https://www.activistpost.com/2011/02/alien-life-boost-after-nasa-finds-one.html