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).
How much of U.S. energy consumption and electricity generation comes from renewable energy sources? How much of world energy consumption and production is from renewable energy? How old are U.S. nuclear power plants, and when was the newest one built? What is U.S. electricity generation by energy source? What is the difference between electricity generation capacity and electricity generation? What is the efficiency of different types of power plants?