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).
What Is Wind Energy? Wind energy is now the second fastest-growing source of electricity in the world, with a global installed capacity of 432,883 megawatts (MW) at the end of 2015. There are over 75,000 MW of wind capacity operational in the U.S., as of August 2016.