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).
According to the Energy Information Administration, renewable energy will account for about one-third of new electricity generation added to the U.S. grid over the next three years. Wind energy is leading the way with 19,500 MW of installed capacity at mid-year, including more than 1,000 MW added in the last six months.