This Calculator should be used as an estimating tool ONLY. 1  Enter the dimensions below to calculate how many bags of concrete you need. After entering the dimensions of the pad, click on Calculate and the calculator will provide you with the amount of concrete. 2  ft in. 3  ft in.  ft in.
According to the International Renewable Energy Agency (IRENA), renewable energy employment in the United States reached 724,000 jobs in 2014, a 16 percent increase from the previous year (IRENA does not include large-scale hydropower in their estimates).
Solar technologies, both photovoltaic and concentrating, employ almost 374,000 workers, or 43 percent of the Electric Power Generation workforce. This is followed by fossil fuel generation employment, which accounts for 22 percent of total Electric Power Generation employment and supports 187,117 workers across coal, oil, and natural gas generation technologies.