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.
Outdoor hiking has a myriad of benefits for both the body and the mind. Hiking is inexpensive and easy to start, so you can participate no matter how fit you currently are. Most people live within driving distance of wonderful hiking spots and discovering these places is a good way of getting to know an area. Here's a look at some of the benefits of hiking. Outdoor Hiking Promotes Mental Health. Hiking is much more varied than many other types of exercise, particularly those undertaken in a gym.
What is Average? Hikers will vary in their conditioning, weight of gear, natural fitness, comfort range, and several other factors that influence hiking speed. With all these considered, most hikers will average about 2-3 miles per hour (3.2-4.8 km/h). Besides personal differences, different trails will have a huge impact on your hiking speed. Some trails are at a higher elevation, which decreases the amount of oxygen replenishing your muscles. Sand or gravel can make hiking more difficult as well.