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).
In 2012, around 249,000 people were directly and indirectly employed by the European wind energy sector â a significant increase from the 182,628 employed in 2007. Jobs range from manufacturing to services and development. By 2020, more than 520,000 people will be employed by wind energy.