Another danger from fracking: mining the fine-grain sand [ it uses can poison water and air. ]( http://www.prwatch.org/news/2014/09/12611/frac-sand-mining-puts-upper-midwest-communities-risk-report-confirms )
Ссылка: https://stallman.org/archives/2014-jul-oct.html#2_October_2014_%28Fracking%29