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).
Failure to do so could result in a more restrictive EPA-mandated plan. Today, solar is the fastest-growing source of renewable energy in the United States, employing 143,00 Americans and accounting for nearly 30 percent of all new electric generation capacity installed in 2013 â second only to natural gas.