According to a new study by the American Chemical Society, the world's first composite mortar was sticky rice, used in China some 1,500 years ago.
06/01/2010 02:33 pm
US recyclers are nervous about losing their largest market after China began enforcing new environmental laws this year.
Doing Good
What happens when ordinary people decide to pay it forward? Extraordinary change...
David Eads sits among old computer parts waiting to be recycled or refurbished by FreeGeek Chicago volunteers.
David Eads runs FreeGeek Chicago, 'an Apple Store for the rest of us'
FreeGeek Chicago gives volunteers hands-on training in restoring old computers to sell or recycle – while they earn credits toward taking home their own desktop or laptop free of charge.
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