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).
On November 14th, 2012, The Solar Foundation released its third annual National Solar Jobs Census report, which found that the U.S. solar industry currently employs 119,016 Americans. This figure represents the addition of 13,872 new solar workers and a 13.2 percent employment growth rate over the past 12 months.