_SRANDA_: poustim se na tenkej led, ale myslim, ze ani klasickej polystyren nejni pro plisne ten pravej zdroj uhliku.

_SRANDA_: informace je dobre si overovat... ;)

Google’s environmental focus made a 2009 article in the British newspaper The Sunday Times claiming Google searches generated large amounts of greenhouse gases particularly painful for the company. The article, which caused a stir in the environmental community, said a Google search could generate the same amount of carbon as boiling a kettle of water for tea.

Google defended itself vigorously, and the paper later accepted Google’s contention that most Google searches produce 35 times less carbon than the report suggested. Still, the report, along with concerns that power use by big data centres that Google and others rely on was growing rapidly, prompted Google to conduct detailed studies of the company’s efficiency, power use, and greenhouse gas emissions.

Google reveals energy use to show search is green - thestar.com
http://www.thestar.com/business/companies/google/article/1051081--google-reveals-energy-use-to-show-search-is-green
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Recently, though, others have used much higher estimates, claiming that a typical search uses "half the energy as boiling a kettle of water" and produces 7 grams of CO2. We thought it would be helpful to explain why this number is *many* times too high. Google is fast — a typical search returns results in less than 0.2 seconds. Queries vary in degree of difficulty, but for the average query, the servers it touches each work on it for just a few thousandths of a second. Together with other work performed before your search even starts (such as building the search index) this amounts to 0.0003 kWh of energy per search, or 1 kJ. For comparison, the average adult needs about 8000 kJ a day of energy from food, so a Google search uses just about the same amount of energy that your body burns in ten seconds.
Official Google Blog: Powering a Google search
http://googleblog.blogspot.com/2009/01/powering-google-search.html
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Whenever possible, we use renewable energy. We have a large solar panel installation at our Mountain View campus, and we’ve purchased the output of two wind farms to power our data centers. For the greenhouse gas emissions we can’t eliminate, we purchase high-quality carbon offsets.

But we’re not stopping there. By investing hundreds of millions of dollars in renewable energy projects and companies, we’re helping to create 1.7 GW of renewable power. That’s the same amount of energy used to power over 350,000 homes, and far more than what our operations consume.
http://googleblog.blogspot.com/2009/01/powering-google-search.html

ona celkove konvenci pestovani na polich neni nic moc moc. Traktory udusavaj pudu, zerou ropu apod. na pestovani mi nejrozumnejsi prijde projekt AGROKRUH od jednoho slovaka. .. http://www.ceskatelevize.cz/ivysilani/10122071611-chalupa-je-hra/409236100111030/titulky/ (je tam o jurte, ale v druhe pulce o tom agrokruhu, jinak se to da i vygooglovat, ale pozor, kazdy vyhledany vyraz v googlu je 7g CO2 do ovzdusi (http://www.emag.cz/dva-pozadavky-na-vyhledani-googlem-vyprodukuji-stejne-oxidu-uhliciteho-jako-ohrati-konvice-vody/). Zkousim ted pouzivat http://www.ecosia.org/, ktera alespon rozumne vyuziva zisk.
jo a k tomu polystyrenu, co sem slysel, tak bily se v evrope moc nepouziva (a tak ho lifruj k nam) ze prej tam vznika mezi zdi a to izolaci nejake plisne ci cos podobneho, tak ho nahrazuje mineralni polystyren (sedy), do ktereho se pridava uhlik, ktery neni zivnou pudou pro plisne aj.
a jeste k tomu vyzbiravani polystyreu, zni to asi dnes divne, ale proc ne. Bavil jsem se s chlapykem z technickych sluzeb a tvrdil mi ze kilogram PET se vykupuje za cca 15Kc, takze proc by nemohlo byt casem neco podobneho i na polystyren, myslim ze vyuziti by nejake nasel a pomer zdroju (ropy) na mnozstvi vysledneho produktu (polystyren, mikrotenovy sacek aj. je fakt uzasny a je tedy asi lepsi z ropy neco vyrabet, nez ji pouzivat na pohon.

SWATKA: Já nesoudím. To byl vtip - reakce na toho "pěstitele ovcí". Představila jsem si, jak tam za barákem máte záhon ovčího porostu ;-)