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).
The study also demonstrates that a high renewables scenario can meet electricity demand across the country every hour of every day, year-round. Variable resources such as wind and solar power can provide up to about half of U.S. electricity, with the remaining 30 percent from other renewable sources. Increasing renewables to supply 80 percent of U.S. electricity does not, however, limit energy choices to one specific pathway. Rather, the NREL study shows that a range of renewable energy scenarios provide the nation with multiple pathways to reach this goal.