http://news.nationalgeographic.com/n...onment-ngfood/
better late than never. soil day was the 5th.
you know, people in general find history boring. i love it...and you'd think enough would study it to learn from it. but, we don't.
the romans knew full well that lead was deadly-they used it anyway, not caring that the mining of lead killed the peasants extracting it-because, who cares about some peasants. they used it in plumbing (chemical sympol PB-plumbum, latin for lead) because it was cheap and easily workable.
not long ago, the oil industries fought tooth and nail to keep lead in gas-the main reason to use lead? to stop the knocking in engines. they argued that since lead is 'natural' it can't be harmful-a type of 'logic' used by michele bachmann not long ago in talking about carbon dioxide.
now, last i checked, we still only have one livable planet. so, if we keep mucking it up-well, where's everyone going to go?