The extraction process to remove the lead from the sulfur is very simple, thus lead has been extracted from Galena since the earliest times.Galena from certain regions is rich in silver, and some specimens may contain as much as 20 percent silver. Because of this, silver-rich Galena is also an ore of silver.
Being exposed to sunshine will also increase your levels of vitamin D. Hiking is a cardiovascular activity, depending on how hard you push yourself during a hike, and thus has benefits for your cardiovascular system, such as reducing the chances of heart disease, and increasing your overall fitness.
hiking image by Galyna Andrushko from Fotolia.com. A hiking stick can make you more nimble while crossing a slippery river crossing or take some of the load from your knees while you finish those last few miles on the trail. The wood you choose plays a crucial role in the stick's construction.