Mining is hard physical work. Mine workers have to be physically strong and have the proper mental attitude to do their job effectively.
Mine employees are employees who risk their lives at work.
At the moment, plenty of people are doing a lot of tasks using internet. They are chatting with friends and families, shopping, enjoying video games. And more people each year are earning money online, using binary option.
Nowadays many people ask themselves what is the best way of making their house well insulated. In history we did it with rocks plants or even straw.