He did not try to plant a Spanish flag atop the limestone outcrop that gives Gibraltar its nickname of “the Rock”. Nor did he renounce a centuries-old battle to regain sovereignty.

Bleaching occurs when the tiny plant-like coral organisms die, often because of higher temperatures, and leave behind only a white limestone reef skeleton.

Minerals can be obtained to be added to your soil from ground up rock or limestone to create the nutrition required to sustain healthy plant life.