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).
In 2014, renewable sources of energy accounted for about 10% of total U.S. energy consumption and 13% of electricity generation. 1. Learn more: U.S. Energy Facts. Renewable Energy. Historical data on U.S. primary energy consumption by energy source. Historical data on U.S. electricity generation by energy source. Historical data on U.S. renewable production and consumption. 1 Preliminary data.