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Sustentabilidade
Estudo mostra que radiações Wi-Fi danificam as árvores
Radiation from Wi-Fi networks is harmful to trees, causing significant variations in growth, as well as bleeding and fissures in the bark, according to a recent study in the Netherlands.
All deciduous trees in the Western world are affected, according to the study by a group of institutions, including the TU Delft University and Wageningen University. The city of Alphen aan den Rijn ordered the study five years ago after officials found unexplained abnormalities on trees that couldn't be ascribed to a virus or bacterial infection.
Additional testing found the disease to occur throughout the Western world. In the Netherlands, about 70 percent of all trees in urban areas show the same symptoms, compared with only 10 percent five years ago. Trees in densely forested areas are hardly affected.
Besides the electromagnetic fields created by mobile-phone networks and wireless LANs, ultrafine particles emitted by cars and trucks may also be to blame. These particles are so small they are able to enter the organisms.
The study exposed 20 ash trees to various radiation sources for a period of three months.
Trees placed closest to the Wi-Fi radio demonstrated a "lead-like shine" on their leaves that was caused by the dying of the upper and lower epidermis of the leaves. This would eventually result in the death of parts of the leaves. The study also found that Wi-Fi radiation could inhibit the growth of corn cobs. The researchers urged that further studies were needed to confirm the current results and determine long-term effects of wireless radiation on trees. [fonte: macworld]
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- Shelley Sacks On Art, Social Sculpture And Creating A Sustainable World
Check Out Education Podcasts at Blog Talk Radio with Steve and Mary Alice on BlogTalkRadio We'll explore with Shelley Sacks how socially engaged artistic processes can help individuals and communities find new ways new ways of engaging with the world...
- Detroit, Germany: Study Warns Of Ongoing Depopulation Trend
Rents in many large German cities are too high, but in some towns vacancies are rampant. A new study warns that if these developments continue, many cities could end up looking like Detroit. Long lines, desperate renters: Those who have tried to find...
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Large amounts of solar and wind power could be added to the western U.S. power grid without significant spending if utilities make operational changes, the U.S. Department of Energy said 20 May 2010. The DOE report, conducted by the National Renewable...
- Evolução - Grande Notícia Da Semana (por Falta De Tempo Fica Em Inglês)
Of microorganisms and man. First large-scale formal quantitative test confirms Darwin's theory of universal common ancestry Physis Org, May 12, 2010 More than 150 years ago, Darwin proposed the theory of universal common ancestry (UCA), linking all...
- Chernobyl 24 Anos Depois Desta Tragédia - Quase Um Milhão De Pessoas Morreram, São Dados Do Novo Livro
NEW YORK, New York, April 26, 2010 (ENS) - Nearly one million people around the world died from exposure to radiation released by the 1986 nuclear disaster at the Chernobyl reactor, finds a new book from the New York Academy of Sciences published today...