<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Crispin, if you refer to the activities in the 80s to combat the effects of 'the Waldsterben' due to acid rain, that rock was limestone to mitigate the acidity... and it did help on a short-term basis. the long-term mitigation though came when they cleaned up the sulfuric emissions from the high chimneys that caused the acid rain in the first place.<br><div><div><br></div><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div lang="EN-CA" link="blue" vlink="purple"><div class="WordSection1" style="page: WordSection1; "><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 10.5pt; font-family: Consolas; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 10.5pt; font-family: Consolas; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; ">I presume you have heard about a fad (craze? activity?) in Europe of walking through damaged forests and adding powdered rock with several claims made about how that assisted the forest to regain health.<o:p></o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 10.5pt; font-family: Consolas; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; "><o:p> </o:p></span></div><div style="margin-top: 0mm; margin-right: 0mm; margin-bottom: 0.0001pt; margin-left: 0mm; font-size: 10.5pt; font-family: Consolas; "><font class="Apple-style-span" face="Calibri, sans-serif" size="4"><span class="Apple-style-span" style="font-size: 15px;"><br></span></font></div></div></div></span></blockquote></div></body></html>