Archive: 21/07/2009

Green Ideas: Making Concrete from Rice

( -- Concrete accounts for about 5% of all human-related CO2 emissions. The fact that we use so much cement in building could mean that the issue becomes even more pronounced in the future. But what if there was ...

dateJul 21, 2009 in Materials Science weblog
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Chinese Web sites close amid tightening controls

(AP) -- Two more Web sites dedicated to social networking went offline in China on Tuesday amid tightening controls that have blocked Facebook, Twitter and other popular sites that offered many Chinese a rare taste of free ...

dateJul 21, 2009 in Internet
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