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).
We have the technologies and resources to reliably produce at least 40 percent of our electricity from renewable energy sources within the next 20 years, and 80 percent by 2050. Learn more: 1  Renewable Energy Technologies. 2  Renewable Energy Can Provide 80 Percent of U.S. Electricity by 2050.