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).
While a relatively small fraction of our overall energy supply in 2012 (the most recent data from the Energy Information Administration), the United States was the worldâs largest consumer of renewable energy from geothermal, solar, wood, wind, and waste for electric power generation producing 22% of the worldâs total.