- 15 Jan 09, 13:53#87758
Carbon negative Cement that could change the World.
http://ecoworldly.com/2009/01/02/cement ... cientists/" onclick="window.open(this.href);return false;
http://ecoworldly.com/2009/01/02/cement ... cientists/" onclick="window.open(this.href);return false;
“ An infinite number of mathematicians walk into a bar. The first one orders a beer. The second orders half a beer. The third, a quarter of a beer. The bartender says “You’re all idiots”, and pours two beers.



