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).
One out of every 78 new jobs created in the U.S. over the past 12 months were created by the solar industry, representing nearly 1.3 percent of all jobs created in the country. Solar companies surveyed for the fifth annual census plan to add another 36,000 employees this year.